Homework Set 10-1: Kinetic Molecular Theory
1.
Use kinetic molecular theory to explain each of the following properties of gases:
a.
expansion
b.
low density compared to solids and liquids
c.
compressibility
d.
fluidity
2.
How does the kinetic molecular theory explain the pressure exerted by gases?
3.
Explain why heating a contained gas that is held at a constant volume increases its pressure.
4.
Use the drawing below to help explain why the gas pressure decreases when gas is removed from a
container with a fixed volume.
Decreasing Pressure
200 kPa
5.
How is the kelvin temperature of a substance related to the average kinetic energy of its particles?
6.
Explain why gases diffuse quicker at higher temperatures.
7.
Arrange the following gases in order of increasing speed. Assume all the gases are at the same
temperature.
O2 ; CH4 ; Cl2 ; He
8.
Suppose you have two 1.0 L flasks, one containing N2 at STP, the other containing CH4 at STP. How do
they systems compare with respect to:
(a) number of molecules in each container
(b) average kinetic energy of the molecules
(c) the speed of the molecules