Chem B: Gases and Gas Laws

At a constant pressure, the volume decreases.  What happens to the temperature?

• increases
• decreases
• stays the same

At a constant volume, the pressure increases.  What happens to the temperature?

• increases
• decreases
• stays the same

At a constant temperature, the volume decreases.  What happens to the pressure?

• increases
• decreases
• stays the same

A 2.00 L sample of pure oxygen gas (O₂) is measured at STP.  How many moles of oxygen is this?

• 24.4 mol
• 0.007 mol
• 1.44 mol
• 0.09 mol

The volume of a gas is increased from 150.0 mL to 350.0 mL by heating it. If the original temperature of the gas was 25^oC, what will its final temperature be (in ^oC)

• 146 ^oC
• 10.7 ^oC
• 58.3 ^oC
• 422 ^oC

According to ___________, if you decrease the volume of a container of gas and hold the temperature constant, the pressure of the gas will increase.

• Bernoulli's principle

• Boyle's Law

• Charles's Law

• Archimedes' principle

At STP (Standard Temperature 273 K and Pressure 101.3 kPa), a gas has a volume of 3.0 L. What is the new volume if the pressure increases to 303.9 kPa?

• 9 L

• 1 L

• 9 kPa

• 1 kPa

A sample of pure oxygen gas has a volume of 2.00 L at a pressure of 101.3 kPa. What is the new pressure is the volume is decreased to 0.5 L?

• 203 kPa

• 101 kPa

• 25 kPa

• 405 kPa

What are the values for STP?

• 0 K and 1 atmosphere

• 0ºC and 1 atmosphere

• 32ºF and 1 atmosphere

• 100ºC and 1 atmosphere

What is zero degrees Celsius converted to Kelvin?

• 100

• 273

• 373

• 212