Mixture Definition and 277 Threads

I am studying vapor liquid eqilibrium for two component systems. There are some things which confuse me right now. These are the questions: - (1) Since there has to be atleast one phase, the degrees of freedom are maximum three. Which means, the degrees of freedom are P, T and composition...

I am interested in describing the heat transfer and temperature gradients within a mixture of independent radiating bodies. States like this occur in many systems and i have been having a bit of trouble modeling this simple scenario. An example of a system is charcoals within a BBQ, and also...

Homework Statement A gaseous mixture contains 2.75 L of helium, some argon at 1.10 atm, and some neon at 25ºC. For which gas can the number of moles be calculated? Calculate the number of moles present of that gas. (This is exactly what the problem asks.) Homework Equations PV = nRT...

Hey everyone, I'm new to the forums here and just have a question. Homework Statement A piston-cylinder device contains a mixture of .2kg of H2 and 1.6kg of N2 at 100kPa and 300K. Heat is now transferred to the mixture at constant pressure until the volume is doubled. Assuming constant...

Homework Statement A tank contains 200 liters of fluid which 30 grams of salt is dissolved. Brine containing 1 gram of salt per liter is then pumped into the tank at a rate of 4 L/min; the well-mixed solution is pumped out at the same rate. Find the number A(t) of grams of salt in the tank...

My dad and I were having a discussion about filling a container with a 2 part mixture (50/50), draining off X amount of it and then refilling it with only 1 part of the mixture. For example: - Suppose we have a container that holds 10 gallons. We fill it with 5 gallons of water and 5 gallons...

Homework Statement You pour a certain amount of water at 100C and an equal amount of water at 20C into an insulated container. THe final temperature of the mixture will be (a) 60C (b) Less than 60C (c) greater than 60C. Homework Equations The Attempt at a Solution I don't know what...

I am looking for a non dimensional parameter that will tell me if I can neglect the flow of one of the gases and just consider the mass and momentum conservation equations for the background species. This is not a homework question. For example: If there is a pipe dumping a contaminant into...

Two ideal gases are mixed in the box of infinite height placed in constant gravitational field. There are n_1 moles of the first gase and n_2 moles of the second. Their molar mases are M_1 and M_2 respectively. Let's assume that the temperature is constant. What's the molar concentration as...

Homework Statement A mixture of NaCl and NaBr has a mass of 2.08 g and is found to contain 0.76 g of Na. What is the mass of NaBr in the mixture? Homework Equations Molar mass equations (possibly), formula mass The Attempt at a Solution I've calculated the percent composition of Na in...

Homework Statement A quantity of 100g of ice at 0°C and 50g steam at 100°C are added to a container that has 150g water at 30°C. What is the final temp of the container? Ignore the container itself in the calc. Homework Equations Q=mc (change in T) Q=mLThe Attempt at a Solution I know how to...

Homework Statement A and B are two identical containers connected by a tap initially closed. A contains an ideal gas at a pressure P1 and temperature T1. B contains the same gas at a pressure P2 and a temperature T2. The tap is the opened. If the temperatures of the containers A and B remain...

What is the Air/Propane mixture Ratio? The Fuel Air Ratio of a Jet Engine is 15 to 1. This is for JP4. What is the Fuel Air Ratio for Propane Gas? I have learned the only difference between a rocket engine and pulse jet engine is the pulse jet runs on the oxygen that is in the air (30%...

I am prepare for a practical experiment, this is a practical experiment aim to identify the anions and cations in the solution, and those ions are choosed from Pb, Ba, Ca, Cu,Fe2, Fe3 and CO3, Cl, PO, SO, NO3. where can i find the solubility in water for any ionic compound that can be formed...

Homework Statement A 500 gallon tank is filled with pure water. A solution containing 4lbs of salt per gallon is added at a rate of 2 gallons per minute. The well-mixed solution is drained at a rate of 3 gallons per minute. A) How long does it take for the container to achieve a...

A solution which is formed by combining 200. mL of 0.15 M HCl with 300. mL of 0.090 M NaOH has a pH of ____ ive worked out concentration of H ion is 0.03 and the concentration of OH ions 0.027. but i don't know what to next? answer is 2.2 thanks

Im trying to figure out how to find the dE/dx for a mixture of gases. I can find how to figure it out for an individual molecule knowing dE/dx for each element, but can't find how to find it for a mixture of two molecules of gases knowing dE/dx for each gas. Is there anywhere I can find the...

Homework Statement I need to calculate the mass of CO2 in a mixture where there is 1.5kg of N2 and 1kg of O2 present. The total pressure of the mixture is 1.5bar, the volume is 2m^3 and the temperature is 293K. I also know the cv values for the constituents. Homework Equations I...

Mary was working in a chemistry lab with a mixture of chemicals that was 90% water and weighed 20 pounds. After returning to the lab from a weekend break, she calculated the mixture was now 50% water. How much does the mixture now weigh? For purposes of this puzzle, assume the non-water part of...

Homework Statement 2.00M chlorus acid and 2.00M formic acid are mixed. What is the pH? Homework Equations Ka of chlorus acid is 1.1×10-2 Ka of formic acid is 1.78×10-4 The Attempt at a Solution For chlorus acid with quadratic equation to find x: x²+0.011x-0.022...

Hello, Currently, I am working on a science project involving the creation of silica aerogels through the process of freeze-drying. As a result, i need to experiment with mixtures of solvents with low thermal expansion coefficients (so the crystallization of the solvents will not damage the...

Homework Statement A two phase mixture of gas and liquid (small air bubbles dispersed in water for example) may be treated as a continuum for the transmission of sound of long wavelengths. The liquid behaves as a heat reservoir, and pressure changes are approximately isothermal. Let rv be...

Homework Statement We have two solutions: One solution that has 0.300 L of 0.100 M acetic acid, and the other with 0.100 L of 0.200 M CN^-. We mix the two solutions. At equilibrium, what is the pH of the resulting solution? Homework Equations For acetic acid, K_a=1.8*10^{-5} For CN^-...

Homework Statement In a mixture of 100 gm , 2 liquids are mixed in ratio 1:3 of their masses . If densities of liquids are 1.25gm/cc and 0.6gm/cc , find the density of mixture. Homework Equations D = mass/Volume The Attempt at a Solution mass = 100g let m1 = x , m2 = 3x d1 =...

Hi, I have a question about separation of solid mixture by extraction. so how can you tell what reacts with what and which layer contains what? k for example, if you have a mixture of phenol and salicylic acid, first the mixture is dissolved in diethyl ether... then the solution is mixed with...

Homework Statement Initially a mixture contains 0.723 mol each of N2 and O2 in an 7.20 L vessel. Find the composition of the mixture when equilibrium is reached at 3900°C. For the reaction below, the Kc = 0.0123 at 3900°C. N2(g) + O2(g) 2 NO(g) Homework Equations I.C.E Tables (not...

If the answer is no, why? Is it possible to show that, given the state spaces we have for individual particles, the singlet state is not a mixture of product states? If yes, how?

1. Beginning at time t=0, fresh water is pumped at the rate of 3 gal/min into a 60-gal tank initially filled with brine. The resulting less-and-less salty mixture overflows at the same rate into a second 60-gal tank that initially contained only pure water, and from there it eventually spills...

I read that when salt and water are mixed that the overall volume decreases by 2.5% (I'm not sure if this is relative to the original volume of the water or both the water and the salt). I'm not sure why this is the case and am interested in that. Moreover, I'd like to know how one would...

Homework Statement A beaker containing 50g of ice and 250g of liquid water is initially at 0celsius. It is then heated on a hot plate until half of the ice is melted. What is the temperature of the ice-water mixture at that point? A. 2.0 C B. 0.5 C C. 1.0 C D. 1.5 C E. 0.0 C Homework...

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...

General question: If given the mass (15.0 g) of a mixture of two solids (NaCl + C12H22O11), can I find the amount of moles in the mixture by multiplying (15.0 g)*(mol / mass NaCl + mass C12H22O11)? I don't think this is valid, but I don't know why not...

Homework Statement Consider an ideal-gas mixture of atoma A, atoms B and molecules AB, undergoing the reaction AB <---> A+B. If n_A, n_B, and n_{AB} denote their respective concentrations, then show that, in equilibrium \frac{n_{AB}}{n_A n_B} = V \frac{f_{AB}}{f_A f_B} = K(T) (the law...

Homework Statement What and how does a mixture form. Homework Equations a mixture can be formed by anything

Homework Statement What is the final temperature of a mixture made from 3kg of ice at -5ºC and 10.8kg o fcopper at 2000ºC. The melting point of copper is 1083ºC. Homework Equations Q=mct(delta)t mc(delta)t + mc(delta)t = 0J m=mass c=specific heat delta t = temperature change...

I have a solution which contains unknown amount of dissolved ferric chloride (FeCl3) and hydrochloric acid. Can I use the titration method with NaOH to determine the concentration of HCl? I was concerned since dissolved FeCl3 is also acidic, and the fact that NaOH will try to neutralize it...

Homework Statement A 22.0 g sample of ice at -12.0°C is mixed with 120.0 g of water at 86.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings. The heat capacities of H2O(s) and H2O(l) are 2.08 and 4.18 J/g°C, respectively, and the enthalpy of fusion...

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...

A 1.00-g solid sample containing a mixture of table salt (NaCl) and citric acid (H3C6H5O7, a triprotic acid) is dissolved in 15 mL of water. Titration of the acid solution requires 40.00 mL of 0.2003 M NaOH solution to reach the endpoint. Calculate the mass percent H3C6H5O7 in the solid...

Dear All... For my first post in this forum I have choosen an easy question for you all! If I have a gas at room temperature and I start to compress it, when the gas reach its dew point, condensation starts What about for a gas mixture?? I try to be clear! I have two real gasses: A &...

If I have a mixture of benzoic acid and benzil, and I add dichloromethane to it and extract it using sodium hydroxide, the benzoic acid reacts with the sodium hydroxide to form sodium benzoate, but what does the benzil react with. I know that its in the organic layer because it's neutral but...

Considering the following N2+ O2= 2NO at 2000 K is 4.0 × 10-4. Consider an initial mixure of 10 moles of N2 and and one mole of O2. How do I find the concentration of NO in the equilibrium mixture in ppm? thank you:confused:

CO oxidation ?? There are two cylinders. First is a CO cylinder having pure 99.97 CO gas and second having zero air. CO is given at 0.1LPM rate and air at 0.9LPM. what is the concentration of CO and what percentage in this mixture?? How to figure it out?

Hello, I have a question about the following statement: "It is well known that warm air in a cooler environment rises. Now consider a warm mixture of air and gasoline on top of an open gasoline can. Do you think this gas mixture will rise in a cooler environment?" I would say Yes, the...

how to prepare the mixture of inorganic material i had a question where i want to mix three diferent inorganic material which are tungstosilicic acid, aluminium oxide and silica oxide.. Can i mixed the three inorganic material without pre-treatment? wat is the suitable process to...

i had a question where i want to mix three diferent inorganic material which are tungstosilicic acid, aluminium oxide and silica oxide.. Can i mixed the three inorganic material without pre-treatment?:confused: wat is the suitable process to prepare a mixture of this inorganic material??

Can I separate water from Carbon tetrachloride by the method of fractional distillation? (I agree separating funnel is a better method)

Homework Statement A 1.5000g sample of a mixture of lithium chloride and lithium bromide was dissolved in water and treated with a 0.1 M AgNO3 solution. The resulting precipitate was filtered, washed, dried and weighed. It weighed 4.463g. A second 1.5000g sample of the mixture was treated...

1. A mixture at T=300 K and P=100 kPa is made up of .1 oxygen, .2 carbon dioxide, and .7 Nitrogen. It is then heated to 300 kPa and 500 K. Find the mass of each component I originally thought using PV=NRT, ideal gas but there doesn't seem to be enough givens. Can you also find the molar...

In the Hartree model of interacting electrons one assumes that the wave function is in the form \Psi(x_1, x_2, ..., x_N,t) = \psi_1(x_1,t) \psi_2(x_2, t) ... \psi_N(x_N,t) which of course is a quite crude approximation since it for example does not take into account Pauli principle. I...