Unit 5 Practice Test

Which state of matter has particles the farthest apart from each other.

• solid

• liquid

• gas

• vaporization

The normal freezing point of water is ___________.

• 32^oC

• 100^oC

• 0 K

• 273 K

• 373 K

The normal boiling point of water is:

• 273K

• 100 K

• 100 ^oC

• 273 ^oC

At 0^oC which phase or phases of water could possibly exist?

• solid only

• liquid only

• gas only

• solid and liquid

• liquid and gas

Convert 25 degrees Celcius to Kelvin

• -248 K

• 25 K

• 262 K

• 298 K

Which of the following temperatures is not possible

• 100 ^oC

• 100 K

• -100 ^oC

• -100 K

Convert 672 torr to atm.

• 0.884 atm

• 1.13 atm

• 1432 atm

• 510,720 atm

Convert 120 kPa to mmHg.

• 0.158 mmHg

• 16.0 mmHg

• 900 mm Hg

• none of these

Which explanation is best:

• When the temperature is increased molecules move slower causing an increase in pressure.

• When the temperature is increased molecules move faster causing an increase in pressure.

• When the temperature is increased molecules move slower causing a decrease in pressure

• When the temperature is increased molecules move faster causing a decrease in pressure.

Which of the following would cause a decrease in the pressure of the gas above. (Check all that apply)

• Putting the same amount of gas into a smaller container.

• Lowering the temperature.

• Allowing gas to leak from the tank.

• Allowing the volume of the gas to expand.