Why is the dissolving of a salt sometimes an exothermic and sometimes am endothermic process?
Answers:
Because sometimes when the salt dissolves it can require energy in order for it to be broken down into its ions..if energy is required it is taken in from the surroundings and used to dissolve the salt..this results in a drop in temperature (the flask containing the salt solution will feel colder, an endothermic reaction). Sometimes when a salt dissolves in water, it will loose some of its energy to the surroundings, this will result in an increase in temperature. (and make it an exothermic process)..I hope this helps =)
As the previous answer but most are exothermic. The total energy of the reaction must be negative from the equation, ^G = ^H -T^S
Where ^ is capital delta
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