When a 7.82-g sample of solid potassium hydroxide dissolves in 100.0 g of water in a coffee-cup calorimeter, the temperature rises from 22.7 °C to 59.2 °C. What is ÎH for the dissolution of KOH in water, as shown below?
KOH(s) K+(aq) + OH(aq)
Assume that all solutions have the same specific heat as water.
119 kJ/mol
119 kJ/mol
1.19 x 103 kJ/mol
16.5 kJ/mol
16.5 kJ/mol