U9.4 – Kinetic Theory & Internal Energy

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Kinetic Theory and Internal Energy

1 / 10

The kinetic theory of gases gives the equation shown above. Which of the following statements is not an assumption made in the derivation of this equation.

2 / 10

What would cause an increase of the internal energy of an ideal gas?

3 / 10

Internal energy is...

4 / 10

The molecules in a sample of gas have a mass of 4.30x10-23 kg. Calculate the r.m.s. speed of the gas molecules when they are at a temperature of 30 °C.

5 / 10

The molecules in a sample of gas are moving at r.m.s. speed of 500 ms-1 at a temperature of 21 °C. Calculate the mass of the gas molecules.

6 / 10

In Switzerland, CERN has 60 gas tanks that can hold 250 m3 of helium gas at 0 °C and 101.325 kPa. The r.m.s. speed of the helium is 1.25 kms-1. Calculate the total number of helium molecules if half of the tanks are full.

7 / 10

The r.m.s. speed of nitrogen molecules at 98 °C is 455 ms-1. Calculate the r.m.s. speed at 1321 °C.

8 / 10

Calculate the temperature at which the r.m.s. speed of oxygen molecules is half their r.m.s. speed at 56.0 °C.

9 / 10

When a gas particle (atom or molecule) directly collides with the wall of it's container, what is it's change in momentum?

10 / 10

The density of air at 20 °C is 1.275 kgm-3 and the atmospheric pressure is 101.325 kPa. Calculate the r.m.s. speed of the air molecules.

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