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Heat Questions - GCSE Level

Q16. A 'can-chiller' is used to make a can of drink colder. The diagram shows a can-chiller.

(a)

The initial temperature of the liquid in the can was 25.0 °C.

The can-chiller decreased the temperature of the liquid to 20.0 °C.

The amount of energy transferred from the liquid was 6930 J.

The mass of liquid in the can was 330 g.

Calculate the specific heat capacity of the liquid in the can - ignore the heat transferred from the can itself.

[4 marks]

(b) Explain how energy is transferred through the metal walls of the can of drink by conduction.

[4 marks]

(c) Explain howthe energy from the can of drink is transferred to the air around the can-chiller by a convection current that is set up around the can-chiller.

[3 marks]

(d) The can-chiller has metal cooling fins that are designed to transfer energy quickly to the surroundings.

Give two features that would help the metal cooling fins to transfer energy quickly to the surroundings.

[2 marks]

(13 marks total)