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Specific Heat Capacity and Latent Heat Questions - GCSE standard

Q11. The diagram shows a bunsen burner heating some water in a beaker.

Eventually the water changes into steam.

(a) Explain how the internal energy of the water changes as it is heated from 20 °C to 25 °C

[2 marks]

(b) Choose one of the sentences below to explain how is the particle model can be used to explain the difference in density between a liquid and a gas.

Tick your choice.

Particles in a gas have less kinetic energy than particles in a liquid.  
Particles in a gas have more potential energy than particles in a liquid.  
Particles in a liquid are further apart than particles in a gas.  
Particles in a liquid are larger than particles in a gas.  

[1 mark]

(c) Brad measured the mass of boiling water that was turned into steam in five minutes.

Explain how the he could use this information to estimate the power output of the bunsen burner in watts.

[4 marks]

(7 marks total)