Page 535 - SUBSEC October 2017_Neat

UNIT 1
MODULE 3: THERMAL AND MECHANICAL PROPERTIES OF MATTER (cont’d)

SPECIFIC OBJECTIVES EXPLANATORY NOTES SUGGESTED PRACTICAL
ACTIVITIES

The Kinetic Theory of Gases (cont’d)

Students should be able to:

4.4. discuss the basic
assumptions of the kinetic
theory of gases;

4.5. explain how molecular
movement is responsible
for the pressure exerted by
a gas;

4.6. solve problems using the Use the equation
2
equation p = ⅓ ρ <c >.
1 2 ̅ ̅̅
= ;
3

1
2 ̅ ̅̅
4.7. use = to Include calculations of
3
2
2
deduce the equation for the r.m.s. speed, c or < c >.
average translational kinetic
energy of monatomic 3

molecules; and, =
2

4.8. deduce total kinetic energy Total kinetic energy:
3
of a monatomic gas. =
2

5. First Law of Thermodynamics

Students should be able to:

5.1. use the term ‘molar heat = ∆
ℎ

capacity’; = ∆

ℎ

5.2. discuss why the molar heat C = C + R
p v
capacity of a gas at constant
Discuss why Cp > Cv
volume is different from
that of a gas at constant
pressure;

5.3. calculate the work done on Distinguish between work
a gas using the equation done on gas during a
W = pΔV ; compression and work done
by gas in expanding.

CXC A16/U2/17 35