[MagicSeaweed]

A saturated 0.1mol.L-1 KNO3 solution was prepared by placing KNO3 crystals in 5mL water in a test tube and by heating the test tube up to ~95 °C. The test tube is allowed to cool down and at 85 °C small crystals start to appear in the solution. 5 mL water is added and the test tube is heated again in order to dissolve all the crystals. The test tube is again allowed to cool down and at 49 °C small crystals start to appear in the solution. Calculate the following thermodynamical entities of the dissolution process of KNO3:
(a)  standard enthalpy of dissolution [6½]

[Borek]

Please read the forum rules. You have to show your attempts at answering the question/solving the problem to receive help, it is a forum policy.

[MagicSeaweed]

I apologize, I forgot to include it.

[mjc123]

Your calculation at the end makes no sense. What is the equation you are trying to use, and what values are you putting into it?