This section covers the following syllabus (Physics 5059) requirements.
compare the properties of solids, liquids and gases
describe qualitatively the molecular structure of solids, liquids and gases, relating their properties to the forces and distances between molecules and to the motion of the molecules
This section covers the following syllabus (Physics 5059) requirements.
infer from Brownian motion experiment the evidence for the movement of molecules
describe the relationship between the motion of molecules and temperature
This section covers the following syllabus (Physics 5059) requirements.
explain the pressure of a gas in terms of the motion of its molecules
recall and explain the following relationships using the kinetic model (stating of the corresponding gas laws is not required):
(i) a change in pressure of a fixed mass of gas at constant volume is caused by a change in temperature of the gas
(ii) a change in volume occupied by a fixed mass of gas at constant pressure is caused by a change in temperature of the gas
(iii) a change in pressure of a fixed mass of gas at constant temperature is caused by a change in volume of the gas
use the relationships in (f) in related situations and to solve problems (a qualitative treatment would suffice)
