(Multiple choice)

(1) True of false:

(a) Two objects in thermal equilibrium with each other must be in thermal equilibrium with a third object.

(b) The Fahrenheit and Celsius temperature scales differ only in the choice of the zero temperature.

(c) The Kelvin is the same size as the Celsius degree.

(d) All thermometers give the same result when measuring the temperature of a particular system.

(2)

Two identical vessels contain different ideal gasses at the same pressure and temperature. It follows that

(a) The number of gas molecules is the same in both vessels.

(b) The total mass of gas is the same in both vessels.

(c) The average speed of the gas molecules is the same in both vessels.

(d) None of the above is correct.

(3) True of false:

The absolute temperature of a gas is a measure of the average translational kinetic energy of the gas molecules.

(4)

A vessel holds an equal number of moles of helium and methane, CH4. The ratio of the rms speeds of the helium atoms to the CH4 molecules is _______.

(a) 1

(b) 2

(c) 4

(d) 16

(5) True of false:

If the pressure of a gas increases, the temperature must increase.