3. A sample of an ideal gas is contained in 3.50L cylinder. It is at a pressure of 2.55 atm. The temperature of the gas is at 250 K. How many moles of gas are in the cylinder?

A rigid container holds hydrogen gas at a pressure of 3 atm and a temperature of 2 degrees C. a. What will the pressure be if the temperature is raised to 33 degrees C? p =  atm b. If you whish to drop the pressure to 1.50 atm, what termperature would be necessary? T = K

6. The following data show the relation of vapour pressure of liquid Z as a function of temperature. p/mmHg T/°C 17.54 20 31.82 30 55.32 40 92.51 50 149.38 60 233.70 70 Using linear regression technique, compute the molar enthalpy of vaporization of liquid Z!

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A gas storage tank of fixed volume V contains N molecules of an ideal gas at temperature T. The pressure at kelvin temperature T is 20 MPa. molecules are removed and the temperature changed to 27T. What is the new pressure of the gas? O 10 MPa O B. 15 MPa OC. 30 MPa OD. 40 MPa

a.) An ideal gas is in a sealed container. By what factor does the gas temperature change if the volume is halved and the pressure is tripled? b.) An ideal gas is in a sealed container. By what factor does the gas temperature change if the volume is doubled and the pressure is tripled? c.) If you have two jars containing the same amount, n1=n2, and type of gas (for example, oxygen) and they are at the same temperature, T, what can you say about their pressure if the first jar has four times the volume of the second, V1 = 4V2?  Hint: use pV=nRT

7. If I have an unknown quantity of gas held at a temperature of 1195 K in a container with a volume of 25 liters and a pressure of 560 atm, how many moles of a. 143.0mol gas do I have? d. 0.3457mol b. 0.01004mol C. 146.0mol 8. If I have 21 males of g3s held at a

Which of the following should be done to lower the pressure of 1.0 mole of an ideal gas in a 22.4 L container to absolute zero?     A Add another mole of gas to the container.     B Cool the gas to zero degrees celsius.     C Cool the gas to absolute zero.     D Compress the container to one-third the size.     E Triple the volume of the container.

A closed, rigid container with a given mass of helium gas is heated until the temperature is doubled. Which of the following statements is TRUE? A The pressure of the gas is unchanged, because there is no relationship between temperature and pressure. The pressure of the gas is unchanged, because helium gas is lighter than the air outside the container. The pressure of the gas also doubles, because temperature and pressure are directly related. D. The pressure of the gas is halved, because temperature and pressure is inversely related. ©2021 Iluminate Education TM, Inc.

7. Containers A and B in the figure to the right hold the same gas. The volume of B is four times the volume of A. The two containers are connected by a thin tube (negligible volume) and a valve that is closed. The gas in A is at 300 K and pressure of 1.0 × 10³ Pa. The gas in B is at 400 K and pressure of 5.0 × 105 Pa. Heaters will maintain the temperatures of A and B even after the valve is opened A 300 K Valve B 400 K a) After the valve is opened, gas will flow one way or the other until A and B have equal pressure. What is the final pressure? b) Is this a reversible or an irreversible process? Explain..