What is Condensation: Definition and 138 Discussions

Condensation is the change of the physical state of matter from the gas phase into the liquid phase, and is the reverse of vaporization. The word most often refers to the water cycle. It can also be defined as the change in the state of water vapor to liquid water when in contact with a liquid or solid surface or cloud condensation nuclei within the atmosphere. When the transition happens from the gaseous phase into the solid phase directly, the change is called deposition.

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  1. H

    Kind of condensation nucleus

    i will experiment about condensation nucleus. ( make cloud artificial. is my topic ) in my experiment i need high efficiency of condensation nucleus high efficiency mean which one can drop temperature faster and lower please know me some
  2. M

    Can vapor condensation cause significant drop in vapor flow rate?

    Need some help here! My plant just installed a water scrubber for controlling methanol emissions. Results obtained from stack tests have consistently shown the flow rate of the gasses from the scrubber outlet is about 30% of gas flow rate into the scrubber. From process knowledge, most of the...
  3. E

    Why is z=1 below Tc in Bose Einstein condensation?

    Hi. For a Bose gas, my textbook states that below the critical temperature, which is given by n(λth)3/(2S+1)=2.612, the fugacity z=eβμ≈1. Why is this? The most basic explanation possible would be ideal, as I only need the rough idea. Thanks! :smile:
  4. P

    Condensing Vapour at 52 Degrees - 2500kg/hr

    I have read the rules and this IS not homework...i work in a factory Hi I have Vapour at 52 degrees from a tank (-87.7kPa) going to a Condensor (heat exchange) under vacuum pressure (-87.7kPa)...The Condensor uses water on 1 side to condense vapour on the other side... 1. What...
  5. D

    Ideal Bose condensation gas in gravitational field, Statistical Physic

    Homework Statement We have an ideal Bose gas in gravitational field. Show that the critical temperature( the temperature in which the condensation is starting is: T_c = T^0_c( 1 + \frac{8}{9} \frac{1}{ζ(3/2)} (\frac{\pi mgh}{kT^0_c})^{1/2} ) Attempt Lege artis; Firstly I want to...
  6. E

    Why the mass of steam formed during condensation is equal to 9H2

    1. Why the mass of steam formed during condensation is equal to 9H2 While studying about the lower calorific value of fuel the equation is L.C.V.= H.C.V. – heat of steam formed during combustion Now here in the book they have written that, Let ms = mass of steam formed in per kg of...
  7. J

    Understanding Condensation & Vacuum in Steam Engines

    Hello everyone, Could someone help me with the following question: I'm trying to find out the equations that govern this process; why if you condense steam in a cylinder is a partial vacuum created (such as in early steam engines)? The pressure difference then causes the atmosphere to push...
  8. JK423

    Bose-Einstein condensation in the canonical ensemble

    Hello guys, I would really need some help on the following problem. Consider a non-interacting & non-relativistic bosonic field at finite temperature. We are all aware of the fact that such a statistical system is well described by the grand-canonical ensemble in the limit N→∞. However...
  9. JK423

    Bosonic condensation in 1 spatial dimension

    Hello guys, I'm trying to understand bosonic condensation and i would really need your help. The actual question, before getting into the details is: "Why Bose-Einstein Condensation doesn't take place in a one-dimensional (1D) space?" In what follows i'll give you my own (mis)understanding so...
  10. G

    ChemE: vapor pressure and condensation

    Homework Statement A gaseous mixture containing 0.190 mol fraction of carbon tetrachloride (CCl4) and 0.810 mol fraction of dry air is initially at 62.0°C and 1141 mmHg. If this mixture is cooled at a constant pressure, at what temperature does the CCl4 first start to condense? I already did...
  11. B

    FEA - Static Condensation Example?

    Folks, Can anyone point me to an online source detailing an example of the static condensation process in finite elements. I believe sub structuring is another term used to describe the same process. Regards Bugatti
  12. M

    Pressure drop due to friction and condensation

    Hello, I'm struggling with the following problem. We have a dryer in our plant which evaporates acetone and with a blower the vapour is driven to a scrubber. However the efficiency of the scrubber is not sufficient and that is why I want to place a plate heat exchanger in the vapour line to...
  13. A

    Instruments and Imaging: How to prevent condensation inside a closed system?

    Dewing of a mirror or object glass can be countered with various devices and methods, but its occurrence inside a closed system is particularly problematic. I have received the following enquiry (from an experienced observer who has used several instruments over many years) concerning...
  14. I

    Countercurrent condensation loop

    I will be attempting to make liquid nitrogen from air. Part of the process involves passing air compressed to 200 atm through a coil and rapidly expanding it. The expanded air that does not form liquid from the rapid cooling will pass back over the condensor coils in a counter-current fashion to...
  15. S

    Seeking to maintain a steam condensation vacuum of about 0.06Bar

    Just looking for a bit of advice on a problem I am currently having. I am doing some research into the condensation characteristics of steam when under vacuum. However, I am having difficulty maintaing the desired level of vacuum of around 0.06Bar in my current system. Anytime I achieve the...
  16. M

    Static condensation or Guyan reduction

    Hey all, I was going through a few video lectures on youtube. To be specific, this is the video I watched. Now, the professor in the video talks about Dynamic reduction techniques and puts Guyan reduction in that category. For a fact, Guyan reduction is also called Static condensation and...
  17. M

    Condensation on a cold glass during a hot day

    Hello all. Consider the case whereby one brings out a cold drink on a hot day. Why do water droplets form on the surface of the cold glass? I would think that when water molecules in the gaseous state collide with the glass surface, they transfer some energy into the glass. Therefore by the...
  18. J

    Baby rudin condensation points

    1st part of Exercise #27 is: Define a point p in a metric space X to be a condensation point of a set E in X if every neighborhood of p contains uncountably many points of E. Suppose E is in R^k, E is uncountable and let P be the set of all condensation points of E. Prove P is perfect...
  19. M

    Condensation on outside of glasses

    On a warm day, why do droplets of water appear on the outside of a cold glass of water? I don't really understand partial pressure and saturated vapour pressure, but I know it has something to do with this. Like when partial pressure = SVP, the water will boil, but at what point will water...
  20. C

    Quantum entanglement and Bose-Einstein condensation.

    Good afternoon. I am wondering if quantum entanglement could be created between two thermodynamically isolated Bose-Einstein condensates of the same atom produced at the same time in close proximity. Due to the similarity of the systems' mathematics regarding their quantum states (wave...
  21. J

    Bose-Einstein Condensation & de Broglie wavelength

    Homework Statement Bose-Einstein condensation of a fluid occurs when the de Broglie wavelength of a "typical" particle becomes greater than the average nearest-neighbor distance. One can interpret the momentum in the de Broglie equation as p=\sqrt{<p^{2}>} where <p^{2}> means the thermal...
  22. M

    Calculating the Bose-Einstein Condensation Temperature

    Homework Statement Estimate the Bose-Einstein condensation temperature of Rb 87 atoms with density of 10^11 atoms per cm^3. Homework Equations T=\frac{n^{2/3}h^{2}}{3mK_{B}} The Attempt at a Solution This should be just a standard plug and chug question, but my answers are not...
  23. P

    Application of Condensation Sequence to extrasolar systems?

    I have spent many hours today trying to determine at what distances certain substances will condense in protoplanetary disks around stars or temperatures different to that of our sun. I have come to the conclusion that the Inverse-Square Law is key to determining this. However, I am unsure as...
  24. P

    How much liquid water can be produced through condensation in one day

    I am working on a desalinization project and need technical advice. These are the basics: If I have a 1,000 sq ft pool of heated water, covered with a chilled baffle, then enclosed in a greenhouse, how much liquid water can I produce through condensation in one day? Any ideas or feedback...
  25. P

    Planetary Formation Based on Matter Condensation and Accretion

    The understanding of the origins of our planet (as well as the other planets in the Universe) has always remained a question to astronomers. Inherently, the application of Newton’s known concepts of gravity has granted us the ability to make educated assumptions concerning planetary formation...
  26. B

    Condensation of gas using bernoulli's principle

    hi experts This ought to be obvious but it sounds wrong. If I have a pipe carrying butane at a constant flow rate at room temperature fed from a liquid gas bottle without a restrictor so that the gas is almost condensing, then have a constriction in the pipe to accelerate the gas, will...
  27. R

    Difference between Liquefaction & Condensation

    What is the difference between Liquefaction & Condensation, although both deal with change of state from gas to liquid?
  28. I

    Condensation in vacuum container

    Hi, I'm building a lens and stupidly rinsed one component before putting the lens body together with epoxy glue. Now when I leave the lens in the sun the trace of water left in the vacuumed lens body turns into condensation and blurs out the vision. I've seen loads of forums suggesting using...
  29. T

    Can condensation form with still air?

    I'm considering some issues regarding condensation at work. If you have a cold surface surrounded by room temp air, does this air need to be in motion in order for condensation to occur?
  30. A

    Condensation formation on Underside of roof

    Hello, I am attempting to calculate the amount of condensation formation on the underside of a roof (steel sheet). moist air is on the underside of the roof, ambient air on the upper side I know the following properties; RH of moist air Temperature of moist air, T1 Temperature of...
  31. D

    A question about energy of condensation for an ideal multicomponent system

    Hi everyone, I'm new here and I'm a little worried because I'm not able to explain some facts about this topic. I'm trying to model and simulate a condenser that is in the top of a distillation column for a control project. The inlet stream is a multicomponent ideal mixture and it can be...
  32. L

    Naming question; Michael Aldol Condensation

    Hi everyone, So I am performing a michael aldol condensation experiment and i was wondering if anyone can help with the naming. An example of naming would be 6-ethoxycarbonyl-3,5-diphenyl-2-cyclohexenone. This example was in my lab manual; the compound I am synthesizing, has a (p) or...
  33. G

    Physics - humidity and condensation

    Homework Statement A volume Vi = 29.9 L of air at temperature T = 23 °C is compressed at constant temperature to a volume Vf = 5.6 L. The relative humidity of the air before compression is R = 57.9 %. Saturated water vapour in air at this temperature has a vapour pressure vp = 2.83 kPa and a...
  34. G

    How does the condensation of steam into water create a vacuum?

    I know the ideal gas law applies, but how?
  35. B

    How Do You Calculate Interstitial Condensation Correctly?

    Hi all, I would like to confirm the following calculations as I have had to get each from various sources. a) Condensation occurs when Vapour Flow is below the Dew Point? b) Dew point = Temp (DegC) - (100 - Relative Humidity) / 5 c) Vapour Pressure = Relative Humidity (%) x SVP...
  36. P

    Is Bose-Einstein Condensation a First-Order Phase Transition?

    I'm not absolutely sure whether condensation of ideal gas of bosons (without any interactions) is a first order phase transition. Some people claim that it isn't first order phase transition because the entropy of a system is continuous function at critical temperature. According to me however...
  37. W

    A little help with Bose-Einstein Condensation

    Hey guys, So I have to make a presentation on this topic. Does anyone of you know of any recent applications of this phenomenon or helpful introductory paper/article? I'm doing my own independent research too but thought that you guys might know of a very helpful resource/idea that I can look...
  38. A

    Understanding Condensation in a Rankine Cycle

    I am a 2nd year mech engg student. I have a basic doubt in condensers. The steam from turbine exhaust enters the condenser & gets condensed during which its specific volume decreases resulting in formation of partial vacuum. Now according to rankine cycle the process in a condenser is a isobaric...
  39. A

    Water vapor condensation and freezing

    [b]1. When water vapor is condensing or liquid water is freezing? Homework Equations [b]3. The two are affected by the energy of the sorrounding environment is being absorbed into the water.
  40. P

    What kind of bosons can have Bose-Einstein Condensation?

    I notice that some bosons can exhibit Bose-Einstein condensation while others cannot (photons, phonons). Is it true that the bosons can have BEC only when the total number of particles is conserved? In this case, the chemical potential approaches zero at T_c, and particles begin to cluster...
  41. F

    Is condensation reversible above critical pressure?

    I have a 50% carbon dioxide and 50% nitrogen gas mix at 1800psig, 70*F. Is there a reference source for the dewpoint of the CO2 in that mix? Assuming the temperature falls below that dewpoint and the CO2 condenses, will it return to a mix as the temperature is raised? thanks, kw
  42. G

    Loss in gravitational energy during condensation of star

    Homework Statement A spherical star of uniform density p and radius R is formed by the condensation of the interstellar dust from large distance due to gravitational forces. Find the energy change that occurs at some intermediate stage as the radius increases from r to r+dr Hence derive an...
  43. C

    Calculate Water Condensation from Cold Plate

    How can I calculate the amount of water can be obtained from a cold plate (below dew point) considering the air flow (cfm), air temp, relative humidity % and size of the plate? Thank you.
  44. T

    Does the Series 1/(n * Log(n)) Converge Using the Cauchy Condensation Test?

    Homework Statement I need to determine, using the Cauchy Condensation Test, whether or not the series 1/(n * Log(n)) converges. Homework Equations The Attempt at a Solution I believe that this series converges iff 2^n(1/(2^n*Log(2^n)) converges (Cauchy Condensation Test). I...
  45. K

    Isothermal reversible condensation

    Homework Statement A sample of 1.00 mol H20(g) is condensed isothermally and reversibly to liquid water at 100°C. The standard enthalpy of vaporization of water at 100°C is 40.656 kJ mol-1. Find w, q, change in internal energy, and change in enthalpy for this process. Homework Equations...
  46. G

    Condensation points in a separable metric space and the Cantor-Bendixon Theorem

    EDIT: I figured out my error, so don't worry about reading through all of this unless you find it an interesting problem Homework Statement This is Baby Rudin's exercise 2.27: http://img63.imageshack.us/img63/584/fool.png Instead of proving for R^k, I did it for an arbitrary separable...
  47. T

    How Does Bose-Einstein Condensation Affect Pressure in an Ideal Bose Gas?

    show that in the thermodynamic limit the bose gas condensate does not contribute to pressure for ideal bose gas in volume V with N particles.and physically explain. how to get it start?and what will b its physicsl explanation? kindly reply soooooooooooon
  48. fluidistic

    A question about condensation of water

    When I put a near 0°C water in a glass which is at room temperature (around 25-30°C), some water in air (humidity) condensate over the glass. That's what I believe. I understand this like, the water present in the air as gas has molecules with more energy (kinetic, but overall?) than liquid...
  49. E

    Bose Einstein Condensation

    Hi i tried in the other section with no luck. Let me try here if there are anyone here that can help me. the question is: Suppose one catches in 5000-Na atoms in a spherical-shaped cloud with diameter of 2mm. And suppose that the atoms are uniformly distributed in that sphere. At what...
  50. P

    All number of bosons in case of Bose condensation

    All number of bosons in case of Bose condensation is N=N_0+\sum_{\vec{p}\neq 0}N_{\vec{p}} I found in one book that N_0=\hat{b}^+_0\hat{b}_0 In that book author say that \hat{b}^+_0\hat{b}_0=N_0 and \hat{b}_0\hat{b}^+_0=N_0+1\approx N_0 so [\hat{b}_0,\hat{b}^+_0]\approx 0 and...
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