Question

a) Steam produces more burns as compared to boiling water
b) Temperature of the liquid does not change during evaporation. Explain

Answer 1

a) steam causes more severe burns because boiling water is at liquid state by absorbing latent heat of vaporization it turns to gaseous state that is steam and since steam has absorbed latent heat it has more heat content which is why it can cause more severe burns.

b) temperature of the liquid does not change during evaporation because during the change of state the heat energy supply to the substance is absorbed by the particles to overcome the force of attraction between them and they start moving freely by changing its state. since all the heat is absorbed by the particles no change in temperature is observed but well the liquid has converted into gaseous state the temperature starts to rise again.

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Answer 2

a) this is because the latent heat of vaporisation is more in steam as compared to the booking water
b) this is evaporation is a Colling process. in evaporation water does not have any particular temperature to to become vapour. it does mot require heat hence no change in temperature takes place.