chemistry final review

When a gas moves through a tiny opening into an evacuated chamber, ________ is occurring.

• elasticity

• diffusion

• compressibility

• effusion

The main reason that high pressures can squeeze gases into smaller volumes is that gases are ________.

• elastic

• fluid

• compressible

• expansible

The constant motion of gas particles results in diffusion.

• True

• False

Collisions of gas molecules are elastic and exchange energy without losing any energy.

• True

• False

A 500.0 mL sample of gas at a pressure of 70.93 kPa is transferred to a 1050.0 mL vessel at a constant temperature. What is the pressure of the gas in the larger vessel?

• 33.77 kPa

• 14.89 kPa

• 35.00 kPa

• 7401.77 kPa

A sample of gas occupying 350.0 mL at 25.0 °C is cooled to -25.0 °C. What volume does it occupy if the pressure remains constant?

• -350 mL

• 291 mL

• 421 mL

• 582 mL

A sample of gas has a pressure of 202.65 kPa at 20.0 °C. What pressure will exist when the gas is heated to 150.0 °C?

• 140 kPa

• 293 kPa

• 612 kPa

• 276 kPa

A 550.0 mL sample of gas at 40.0 °C and 1.19 x 10^3 kPa is transferred to a second vessel where the temperature is 0.0 °C and the pressure is 9.93 x 10^4 Pa. What is the volume of the second vessel?

• 251 mL

• 526 mL

• 756 mL

• 575 mL

Who formulated a law stating that the total pressure of a mixture of gases equals the sum of the pressures of each individual gas?

• Blaise Pascal

• Thomas Graham

• John Dalton

• Jacques Charles

What scientist devised the law that states P_total = ΣP?

• Robert Boyle

• Amedeo Avogadro

• Jacques Charles

• John Dalton