TUTORIAL 4 [unit 5 – physics FRom creation to collapse – 5.1 thermal energy] 1

TUTORIAL 4 [unit 5 – physics FRom creation to collapse – 5.1 thermal energy] 2

1. Describe how the pressure that gas molecules exert on the walls of a container changes when the temperature of the gas increases. Explain your answer.

2. A cylinder has a fixed volume of 1.36 x 10-3 m3 and contains a gas at a pressure of 1.04 x 105 Pa when the temperature is 15°C.

a. Calculate the number of gas molecules in the container.b. Calculate the new pressure of the gas when the

temperature is increased to 25°C.c. Calculate the increase in kinetic energy of all the gas

molecules in the container caused when the temperature is increased to 25°C.

3.

TUTORIAL 4 [unit 5 – physics FRom creation to collapse – 5.1 thermal energy] 3

ANSWERS

Obj1D 2C 3B 4A1

2a

2b

2c

3a n b

TUTORIAL 4 [unit 5 – physics FRom creation to collapse – 5.1 thermal energy] 4