States of Matter and the Gas Laws Unit Test Review

Which best describes the process that arrow 1 represents?

Molecules are speeding up during boiling.

A scientist is examining a mixture of nitrogen, hydrogen, and ammonia. The individual pressures that are exerted by nitrogen and hydrogen are 0.26 atm and 0.28 atm, respectively. If the total pressure is 0.90 atm, what is the partial pressure of ammonia? Use mc016-1.jpg.

0.36 atm

A tire at 21°C has a pressure of 0.82 atm. Its temperature decreases to -3.5°C. If there is no volume change in the tire, what is the pressure after the temperature change? Use mc006-1.jpg.

0.75 atm

What is the volume of 0.200 mol of an ideal gas at 200. kPa and 400. K? Use mc025-1.jpg and mc025-2.jpg.

3.33 L

A gaseous substance turns into a solid. Which best describes this change?

A substance that has no specific volume changes to a substance that has a specific volume.

Which law is described by saying that when the pressure of a gas in a sealed container is cut in half, the gas will double in volume at a steady temperature?

Boyle's law

The volume of a gas decreases to half of its original volume, but the gas maintains the same number of moles and temperature. According to the ideal gas law, what will most likely happen to the pressure?

It will double.

At what temperature is the substance a heated gas?

above 100°C

The gas and liquid are at

equilibrium.

Which quantity is held constant when working with Boyle's, Charles's, and Gay-Lussac's laws?

moles

The ideal gas constant, R has several different values that could be used. Which quantity causes these differences?

pressure