Question

The heat of dissolution of a solid substance was determined using an insulated calorimeter containing 150 grams of water initially at 27.4°C. If the temperature of the water increased to 32.8°C, what is the heat of dissolution of the solid?

Answer 1

Change in T = $32.8-27.4=5.4°C$

Heat dissolution $= 150×5.4= 810 kj/mol$