Answers

2015-04-21T19:22:32+05:30
When we put some acetone, petrol or perfume it starts evaporating by using the energy from palm and leaving it cool.
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2015-04-21T19:23:51+05:30
acetone, petrol and perfume undergo endothermic reactions which means that the things take in heat from there surroundings, making the surroundings cool. 
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