Q31 of 160 Page 36

Why does steam cause more severe burns than boiling water?

Steam will produce more severe burns than boiling water because steam has more heat energy than water due to its latent heat of vaporisation. Steam and boiling water can exist at varying temperatures but it is only correct to assume here that both are at the same temperature.


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29

Explain why, ice at 0°C is more effective in cooling than water at the same temperature.

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Would you cool a bucket of water more quickly by placing it on ice or by placing ice in it? Give reasons for your answer.

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Which contains more heat,1kg of ice at 0°C or 1 kg of water at 0°C? Give reason for your answer.

 33

Which contains more heat, 1 kg of water at 100°C or 1 kg of steam at 100°C? Give reason for your answer.