Gases Definition and 476 Threads

How do you combine two separate volumes of an ideal gas which are at different temperatures pressures and volumes and then work out the change in internal energy? I have been trying to get my head around this without success.

http://webusers.ct.astro.it/gca/papers/telluric.pdf Would it be possible to use telluric lines to give accurate measurements of atmospheric gases along with synchronous Earth temperature measurements, thus giving an index for gas abundance and variation of heat transfer through same gases...

A child's helium-filled balloon escapes at sea level and 20.0°C. It reaches an altitude of 3330 m, where the temperature is 5.0°C and the pressure only 0.65 atm. What is the ratio of its volume at this altitude to its volume at sea level? PV/T=PV/T i got .94

Homework Statement What volume of CH4 at 0°C and 1.00 atm contains the same number of molecules as 0.58 L of N2 measured at 35.0 °C and 1.50 atm? Homework Equations I think you just need to use Avogadro's Number and multiply by the molar mass? I guess my question is what equation would...

Homework Statement Even at low density, real gases don't quite obey the ideal gas law. A systematic way to account for deviations from ideal behavior is the virial expansion, PV=nRT(1+B(T)/(V/n) + C(T)/(V/n)^2+...) where functions B(T), C(T) and so on are called the virial...

There are two compartments, each has half volume of the total volume, separated by an insulating partition. The whole setup is adiabatic. n mole of a monatomic gas with temperature T1 and pressure P in the left while in the right m mole of monatomic gas with termparture T2 and pressure P there...

Hello, my tutor told me the answer to this questions went beyond the scope of the course. We are taught that according to Le Chatelier principle, a system at equilibrium compensates a changement of pressure by shifting towards products or reactants and thus changing the number of molecules...

I want to calculate the reaction heat in a ammonia convertor but I need some specific heats of N2,NH3,Ar and CH4 at 500°C and 200bar. I could find data at 500°C but not at that pressure. thanks Stefaan

I got one question for you. In the book that I learn from (Physics textbook), I read that "at very small dimensions of the particles (like the molecules of the gases) the force of the light pressuring at small particles can reach the force of gravity which acts on the particles upon." If the...

In high school I've been told that the molecules of gases have generally speed of severals kilometers per second. Hence why the wind is not always present, and why not that fast? (I guess it has to see with the huge number of particles... I never studied such a system in Physics yet, I...

Hi I'm trying to find a value for the density of the exhaust gases emitted from a Honda CBR600 motorcycle engine with not much luck. I only need an approximate value so the density from a similar engine would suffice... Can anyone help?

Hi, my question is this. Is a gas with a positive intermolecular potential like a gravity potential in a pendulum? By this I mean if you compress and the expand the gas the force goes from max potential to a minimum ,creating molecular acceleration in the process and then reverses the...

Homework Statement In the first 2 parts of the problem, I calculated at what temperatures the rms speeds vrms of H2 molecules and O2 molecules would equal the escape speed of Earth (11200 m/s). The answers I calculated for this were 10000 K for H2 and 160000 K for O2. Those answers are...

p=momentum=(mass*volume) delta px = pf - pi mvf - mvi mvx - (-mvx) <<<<---- where does this second negative come from ? what am i missing here? 2mvx in my book it shows that delta px = - mvx - (mvx) = -2mvx

Homework Statement Why is the volume of an ideal gas not important? I'm just asking this for my own studying benefit, it's not technically "homework", although we are studying it. My book says that we can draw the fact that the volume of an ideal gas is not important from the fact that...

I just wonder how necessary gases are for pharmaceutical production. If anyone around has been involved in the process, please inform me some special most used gases. THANK YOU

Hi, Can anyone give me any information on where i could find information on the emissivity of a gas, particulally argon, or how i can calculate it? i am trying to create a graph of heat transfer against temperature and see which plays a larger role at particular temperatures when transfering...

I tried this problem a lot of times, but just didnt get the answer. The molecular mass of helium is 4 g/mol, the Boltzmann’s constant is 1.38066 × 10−23 J/K, the universal gas constant is 8.31451 J/K · mol, and Avogadro’s number is 6.02214 × 1023 1/mol. Given: 1 atm = 101300 Pa. How...

if i was to heat a gas [any gas] by 10 degrees celcius, using the smallest amount of heat energy, would i be better off heating the gas at constant pressure or constant volume. i think constant pressure, however i don't know how to justify my answer...:confused: cheers

Hello everyone, I'm trying to understand quantized vortices in rotating Bose gases. From what I understand, any system that is described by a quantum mechanical wavefunction [tex] \psi [\tex] will be irrotational (in other words, will only be able to get angular momentum through the...

Hi Suppose there are two cylinders / vessels. In one cylinder the pressure is 1.5 bar & in other 0.5 bar.If both cylinder are connected internally through valve connection, what will be the final pressure in both? explain

Homework Statement Temperature of a gas (in kelvin) is proportional to the average kinetic temperature of its particles. Question: The temperature of 55k (277C) to 1100k(827C). At 277C the mean kinetic energy of the gas is 1.14x10^20. What is it at 827C?Homework Equations kinetic energy= ½ x...

Homework Statement A mass of gas occupies a volume of 4.3L at a pressure of 1.2 atm and a temperature of 310K. It is compressed adiabatically to a volume of 0.76L.Determine (a)the final pressure and (b) the final temperature,assuming the gas to be an ideal gas for which gamma = 1.4...

which gas would diffuse the quickest? the slowest? A. methane B. oxygen C. nitrogen D. C2H6 (need to show work to verify!)

I had a question on how to find the stoichimoteric coefficient in combustion reaction contains several types of natural gas. Lets say for example: u start with a natural gas (using moral analysis) 0.865CO2 + a0.08C3H8 + b0.02C3H8 c0.035N2 + d(O2 + 3.76) ------> eCO2 + fH20 + gN2; Using...

[SOLVED] why are noble gases, gases? Homework Statement this has bothered me for some time, what determines the density of an element at normal atmoshpheric conditions? and more importantly what determines if a substance at s.t.p is a gas solid or liquid Homework Equations gas...

Homework Statement why do the noble gases stay at a gas state whe almost every other element in the period doesnt? The Attempt at a Solution because the elctrons repel each other? i don't know

Creating "Visible" Inert Gases Please understand this this question is coming from a completely ignorant user who is just starting his research into an area he knows absolutely nothing about. Given that, my question(s) may make no sense at all to an educated set of people. Thank you. Is...

Avogadro's Law states that the same volume of two different gases (at the same temperature and pressure) contains the same number of particles. I understand that this hypothesis was first suggested after Gay-Lussac's experiments with electrolysis showed that the volumes of hydrogen and oxygen...

I have read that hot gases flow better than cold gases. Why is this so? Less dense? Any good readings on it. I am thinking of incoming intake charge (cool) in an engine, and the outgoing (hot) gases. Thanks.

Hello: I've been reading about the Maxwell Boltzmann distribution for a dilute gas. One of the hypotheses to get this result is that there is only a chemical species within the box, but what would happen if you put a mixture of gases, say two or three, each of which is very dilute and you...

Homework Statement Fractions of Molecules in an Ideal Gas with Speeds Less than Various Multiples of v/v_{\rm rms} in the textbook. The molar mass of {\rm{N}}_2 is 28.0 {\rm{ g/mol}}. For a gas of nitrogen molecules {{\rm{N}}_2 } , what must the temperature be if 94.7\% of all the...

Hi, I am a student currently engaged in AP Physics B and AP Physics C, and I am curious as to why it is that most of the Noble Gases exhibit and exist in such a stable state. In AP Chem last year I learned that having a configuration in which the valence shell of an atom has eight electrons...

Like in the other problem I posted- This is the other question that I missed and just can't find a solution for. Homework Statement Prove the internal pressure is 0 for an ideal gas and ((n^2)a)/(v^2) for a Van der Waals gas. Homework Equations 1. VdQ Eqn: p= (nRT)/(v-b) -...

[SOLVED] Ideal gases an air bubble of volume 20cm^3 is at the bottom of a lake 40m deep where the temp is 4C, the bubble rises to the surface which is at temp 20C, take the temp of the buble to match that of the surrounding water, just as the bubble reaches the surface, what is it's volume...

Hello everyone. We are working on a 8th grade science fair project. We are trrying to conduct experiments that will let us find the relationship of a particular gas's compressabilty and its temerature increase when compressed. We are trying to make the project reletivly advanced, and hope to be...

Homework Statement Using a theoretical treatment including \gamma (the ratio of cp to cv), determine the speed of sound in each of these gases: argon at 273 K, methane at 165 K, nitrogen at 600 K. Answer must be applicable to any gas at any temperature Homework Equations The...

sorry to ask this stupid question... can anyone tell me exactly the difference between liquid and gas based on kinetic model? most textbooks give that in liquids inter molecular spaces are lesser than gases ,etc & etc but if compress the gas to much ,still it doesn't get converted into...

Homework Statement A thin tube of uniform cross-sectionis sealed at both ends . when it lies horizontally,the middle 5cm length contains mercury and the 2 equal ends contain air at the same pressure P. When the tube is held at an angle 60\circ , then the lengths of the air columns above and...

Homework Statement 1.Show that PV^Y is a constant for adiabatic,quassistatic expansion of a photongas and determine Y 2. Show the same for full degenerate gas of fermions at T=0 Homework Equations The Attempt at a Solution Plz help thx

Which of the following is NOT true about gases? 1. The volume a gas occupies is directly proportional to its molecular weight. 2. The gas is at STP if it is at 273 K and 1 atm. 3. Gases exert pressure on their surround- ings. 4. Gases can expand without limit. 5. The density of a gas...

[SOLVED] Ideal Gases Homework Statement A gas has a temperature of 310K and a pressure of 101kPa (a.) find the volume occupied by 1.25 mol of this gas, assuming its ideal. (b.) assuming the gas molecules can be approximated as a small sphere of diameter 2.5x10^-10, determine the fraction of...

Homework Statement A gas bottle contains a mixture of Helium and Oxygen molecules (O2 is diatomic). The root-mean-square velocity for the O2 molecules is 482 m/s. Find vrms for the Helium atoms. Homework Equations 1/2mv^2=1/2mv^2 and solve for velocity of He, however, i am not...

Homework Statement This is for an experiment. I determined the theoretical diffusion ratio of ammonia to hydrogen chloride to be 1.46:1 but my experimental error to be 4.20:1. This means that my percent deviation was around 200%. Question is, what are the reasons for the large percentage...

This is a question relating to a Crooke's radiometer: Assume that due to absorption, the local temperature close to the black surface is T = 50C, while the temperature close to the white surface is T = 20C. For a gas with density n = 2:5 x 10E20m-3, compute the net force on one blade of area...

Few weeks ago a respected magazine brought some excitement with a story on missing bond between Thermodynamics and Relativity. My question is what satisfies the definition of relativistic gas and how would that differ from single star systems with shifted spectra? Take for example...

[SOLVED] Gases Problem Hi Everyone, I was wondering if someone can explain the following question: An apparatus consists of three temperature-jacketed 1.000 L bulbs connected by stopcocks. Bulb A contains a mixture of H2O (g), CO2 (g), and N2 (g) at 25'C and a total pressure of 564 mm Hg...

A balloon featured with a negligible thermal capacity contains V_{l}=3l of ideal gas and is immersed in a lake (thermal bath) at the depth of h_{l}=10m beneath the lake surface. If it is brought to the depth of h_{l}=3m, how much is the heat exchange?

My question is with regard to the derivation for the kinetic theory of gases that allows us to relate temperature to the motion of the particles. I've looked at several introductory Physics texts and the same derivation is given (derivation in italics, my question in red, regular font): To...

Ideal Gases and "Work" Hi When I read up on ideal gases I always find people talking about work extracted from ideal gases. But what kind of work are they talking about? Cheers.