Question

1) When 5.0 g of KOH were dissolved in 74.0 g water in a calorimeter at 23.9^oC, the temperature of the solution went up to 37.8^oC.

a) Is the solution endothermic or exothermic? Why?

b) What is the ΔH for the reaction as it happened in the calorimeter?

c) What is ΔH for the solution of one mole KOH in water with the unit of KJ/mole?

d) Assuming that KOH exists as K⁺ and OH^- ions in solution, what is the equation that occurs when KOH is dissolved in water?

Answer 1