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This question already has an answer here:

I have studied that during a change of state there is no change in kinetic energy of molecules and thus no change in temperature or heat energy. Now my question is that : Why does steam at the temperature of 100 C causes worse burns than water at 100 C? This the question of my assignment. When I asked my teacher, she said that steam has more heat energy in the form of latent heat of vaporisation than water. But I am unable to understand this. If someone can tell a better answer then please do as I have my exam day after tomorrow.

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marked as duplicate by Mithoron, pentavalentcarbon, Tyberius, jerepierre, Todd Minehardt Sep 11 '17 at 20:14

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Steam has more energy, because the phase change from liquid -> gas needs some energy. This energy is released, when the steam comes into contact with your 'cold' skin.

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