Can someone explain to me how come boiling water is endothermic? I thought if the temperature increases and heat is being released than that would be exothermic reaction?
If the heat is supplied to the system then that is called the endothermic system. This required heat come from surroundings i.e., surroundings lose heat to rise the temperature of the system. In water boiling case we are supplying energy from the surroundings to the system ( the container that consists water is system). This supplied heat to the system rises the temperature of water( system) so that water becomes boil.
So the flow of heat is into the system. ==> Endothermic Reaction
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