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all right thatamp;#39;s the pretty common kind of question where you dissolve a certain mass of solid into water and then see how the temperature changes now Iamp;#39;m under the impression that when you dissolve a solid in water generally the temperature goes down a little bit but it just so happened that the salt I picked when I looked it up makes the temperature go up a lot itamp;#39;s actually the salt that you use in hot packs when you break it open in the to mix the temperature goes up a whole bunch in any case the question is if the temperature goes up 17.5 degrees Celsius whatamp;#39;s the heat of solution now what that asks is how much heat is freed when this becomes aqueous or dissolves inside the water now heat of solution or Delta H is also called the heat of dissolution itamp;#39;s also called the heat of dissolving and maybe your teacher used some other word for it but I want to show you how to calculate it long story short you need to know how much heat was liberate