1.

A solid is converted to the liquid at the melting point.

2.

Gas density is the same at all temperatures.

3.

The average kinetic energy of gas molecules depends on

Kelvin temperature.

4.

Air pressure changes with altitude.

5.

The psi ratings in tires on equipment indicate the weight of gas inside.

6.

One atmosphere pressure is 14.7 psi at sea level.

7.

One atmosphere pressure equals 760 mm Hg.

8.

The volume of a gas increases with increased pressure if the temperature stays constant.

9.

Gas laws like Boyles' law and Charles' law can be used to predict

numerical changes in gas properties.

10.

Equal volumes of gas contain equal numbers of gas particles.

11.

STP means pressure of 1 atmosphere and temperature of 273 Kelvin.

12.

The dipole-dipole forces exist only between polar molecules.

13.

All hydrogen containing molecules show hydrogen bonding.

14.

Hydrogen bonding exists when molecules have any of the following combinations. H-F, H-O, H-N.

15.

Strong interactions between molecules result in low melting points.

16.

All liquids have a vapor pressure.

17.

Vapor pressure is high above a volatile liquid.

18.

All solids have a definite crystal structure.

19.

Evaporation and boiling are the same.

20.

People sweat so the evaporation of water can help regulate body temperature.