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15 December, 04:10

Let's say you hold some ice in your hand. the ice melts and your hand feels cold. is the reaction h2o (s? h2o (l endothermic or exothermic? is the change in enthalpy of the reaction positive or negative.

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  1. 15 December, 06:34
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    Your hand feels cold because the heat in it is transport towards the ice, thus melting it. This means that the melting of the ice is an endothermic reaction (heat absorbing). This is the reverse of the exothermic reaction (heat releasing). Hence, the change in enthalpy your hand is negative.
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