Gas Laws & Properties

Front

What happens to the volume of a balloon filled with 0.25 mol of He(g) at 273 K and 1 atm as it rises to an altitude where the air temperature is 220 K and the air pressure is 0.1 atm?

Back

The volume will increase because the decrease in air pressure will have a greater effect than the decrease in temperature.

Front

Predict the change in pressure as the reaction between NO(g) and O2(g) to produce NO2(g) goes to completion at constant temperature.

Back

The pressure will decrease because there are fewer molecules of product than reactants.

Front

The density of the gas, in g/L, is greatest in which container? Options: A, B, C, or the same in all three containers.

Back

greatest in container B

Front

If the volume of a confined gas is doubled while the temperature remains constant, what change (if any) would be observed in the pressure?

Back

It would be half as large.

Front

A given mass of a gas in a rigid container is heated from 100°C to 500°C. What will happen to the pressure of the gas?

Back

increase by a factor of about two.

Front

Density of CH₄ at 200°C and 0.115 atm?

Back

0.0475 g/L

Front

What is the molar mass of a gas which has a density of 1.30 g/L measured at 27°C and 0.400 atm?

Back

80.0 g/mol

Front

A 4.50 L flask of Ar at 23°C and 734 torr is heated to 55°C. What is the new pressure?

Back

1.07 atm

Front

At what temperature will 41.6 grams N₂ exert a pressure of 815 torr in a 20.0 L cylinder?

Back

176 K