EASY
AS and A Level
IMPORTANT
Earn 100

Describe a liquid in terms of the arrangement of its particles, the bonding between them and their motion.

Important Questions on Thermal Physics

EASY
AS and A Level
IMPORTANT
Physics for Cambridge International AS & A Level Coursebook 3rd Edition Digital Access>Chapter 19 - Thermal Physics>Question>Q 2

Use the kinetic model of matter to explain the following:

If you leave a pan of water on the hob for a long time, it does not all boil away as soon as the temperature reaches 100°C.

EASY
AS and A Level
IMPORTANT
Physics for Cambridge International AS & A Level Coursebook 3rd Edition Digital Access>Chapter 19 - Thermal Physics>Question>Q 2

Use the kinetic model of matter to explain the following:

It takes less energy to melt a 1.0 kg block of ice at 0°C than to boil away 1.0 kg of water at100°C. 

EASY
AS and A Level
IMPORTANT
Physics for Cambridge International AS & A Level Coursebook 3rd Edition Digital Access>Chapter 19 - Thermal Physics>Questions>Q 3

Use the first law of thermodynamics to answer the following.

 A gas is heated by supplying it with 250 kJ of thermal energy; at the same time, it is compressed so that 500 kJ of work is done on the gas. Calculate the change in the internal energy of the gas. 

EASY
AS and A Level
IMPORTANT
Physics for Cambridge International AS & A Level Coursebook 3rd Edition Digital Access>Chapter 19 - Thermal Physics>Questions>Q 3

 

Use the first law of thermodynamics to answer the following.

The same gas is heated as before with 250 kJ of energy. This time the gas is allowed to expand so that it does 200 kJ of work on its surroundings. Calculate the change in the internal energy of the gas.

 

EASY
AS and A Level
IMPORTANT
Physics for Cambridge International AS & A Level Coursebook 3rd Edition Digital Access>Chapter 19 - Thermal Physics>Questions>Q 4
When you blow up a balloon, the expanding balloon pushes aside the atmosphere. How much work is done against the atmosphere in blowing up a balloon from a very small volume to a volume of 2 litres 0.002 m3? (Atmospheric pressure = 1.0×105 N m-2.) 
EASY
AS and A Level
IMPORTANT
Physics for Cambridge International AS & A Level Coursebook 3rd Edition Digital Access>Chapter 19 - Thermal Physics>Questions>Q 5
Convert each of the following temperatures from the Celsius scale to the thermodynamic scale: 0°C, 20°C,120°C, 500°C,-23°C,-200°C. 
EASY
AS and A Level
IMPORTANT
Physics for Cambridge International AS & A Level Coursebook 3rd Edition Digital Access>Chapter 19 - Thermal Physics>Questions>Q 5
Convert each of the following temperatures from the thermodynamic scale to the Celsius scale: 0 K, 20 K, 100 K, 300 K, 373 K, 500 K. 
EASY
AS and A Level
IMPORTANT
Physics for Cambridge International AS & A Level Coursebook 3rd Edition Digital Access>Chapter 19 - Thermal Physics>Questions>Q 6

The electrical resistance of a pure copper wire is mostly due to the vibrations of the copper atoms. Table 19.1 shows how the resistance of a length of copper wire is found to change as it is heated. Copy the table and add a column showing the temperatures in K. Draw a graph to show these data. (Start the temperature scale of your graph at 0 K.) Explain why you might expect the resistance of copper to be zero at this temperature.

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 The variation of resistance with temperature for a length of copper wire.