CART - Chemistry Acceleration Readiness Gas Laws and Properties Questions and Answers

Question 1

A flexible container holds 25.0 L of a gas at a pressure of 3.50 atm.
If the temperature and number of moles of the gas remain constant, what is the new volume if the pressure is increased to 5.00 atm?

Accepted Answer

17.5 L

Answer

12.5 L

Answer

35.7 L

Answer

87.5 L

Question 2

A balloon contains 5.0 L of air at 27°C. If the pressure remains constant, to what temperature in Celsius must the balloon be heated to expand its volume to 8.0 L?

Accepted Answer

207°C

Answer

43.2°C

Answer

480°C

Answer

753°C

Question 3

Which of the following statements is NOT a postulate of the Kinetic Molecular Theory of ideal gases?

Accepted Answer

The volume of the gas particles themselves is significant compared to the total volume of the container.

Answer

Gas particles are in constant, random, straight-line motion.

Answer

Collisions between gas particles are perfectly elastic, meaning no kinetic energy is lost.

Answer

The average kinetic energy of gas particles is directly proportional to the absolute temperature (in Kelvin).

Question 4

A rigid 10.0 L container holds a mixture of nitrogen gas (N₂) and oxygen gas (O₂). The partial pressure of the nitrogen is 0.75 atm and the partial pressure of the oxygen is 0.25 atm. What is the total pressure inside the container?

Accepted Answer

1.00 atm

Answer

0.50 atm

Answer

0.75 atm

Answer

Cannot be determined from the information given.

Question 5

A sample of 0.50 moles of an ideal gas is held in a 10.0 L container at a temperature of 298 K. What is the pressure of the gas? (R = 0.0821 L·atm/mol·K)

Accepted Answer

1.22 atm

Answer

0.82 atm

Answer

2.45 atm

Answer

12.2 atm

Question 6

Under which of the following conditions would a real gas be expected to deviate MOST from ideal gas behavior?

Accepted Answer

Low temperature and high pressure

Answer

High temperature and high pressure

Answer

High temperature and low pressure

Answer

Low temperature and low pressure