Gas Laws Review

Define STP in terms of temperature and pressure.

• 0°C (273.15 K) and 1 atm

• 25°C (298.15 K) and 1 atm

• 0°F (255.37 K) and 1 atm

• 100°C (373.15 K) and 1 atm

What is Charles's Law?

• At constant pressure, the volume of a gas is directly proportional to its temperature in Kelvin.

• At constant volume, the pressure of a gas is directly proportional to its temperature in Kelvin.

• At constant temperature, the volume of a gas is inversely proportional to its pressure.

• At constant pressure, the volume of a gas is inversely proportional to its temperature in Celsius.

What is Boyle's Law?

• At constant temperature, the pressure of a gas is inversely proportional to its volume.

• At constant pressure, the volume of a gas is directly proportional to its temperature.

• The volume of a gas decreases as the temperature increases at constant pressure.

• The pressure of a gas increases as its volume increases at constant temperature.

What happens to the volume of a helium balloon when placed in the freezer?

• The balloon's volume increases.

• The balloon's volume stays the same.

• The balloon's volume decreases.

• The balloon pops.

How does temperature affect gas volume at constant pressure?

• Volume decreases as temperature increases.

• Volume remains constant regardless of temperature changes.

• Volume increases as temperature increases (Charles's Law).

• Volume increases as pressure increases.

What is the effect of decreasing the number of moles of gas on pressure at constant volume and temperature?

• Pressure increases.

• Pressure remains the same.

• Pressure decreases.

• Pressure fluctuates.

What is Avogadro's Law?

• At the same temperature and pressure, equal volumes of gases contain the same number of molecules.

• The volume of a gas is directly proportional to its temperature at constant pressure.

• The pressure of a gas is inversely proportional to its volume at constant temperature.

• Equal masses of different gases contain the same number of molecules.

What is the ideal gas law equation?

• PV = nRT

• PV = nR^2T

• P = nRT/V

• PV^2 = nRT

What is the new volume of a gas at STP if its temperature is raised to 273°C and pressure remains constant?

• 2.0 L

• 3.5 L

• 5.0 L

• 7.5 L

What describes the motion of a gas molecule?

• Molecules are tightly packed and vibrate in place.

• Molecules are far apart, move in constant random motion, and travel in a straight path.

• Molecules move in circular paths and collide frequently.

• Molecules are stationary and do not move.