Answer to Question #75133 in General Chemistry for C

Question

When a 2.00 g sample of KCN is dissolved in water in a calorimeter that has a total heat capacity of 1.159 kJ*K^-1 , the temperature decreases by 0.310 K. Calculate the molar heat of the solution.

Answer 1

Answer:
heat capacity of calorimeter = 1.159 kJ*K^-1

1.159 kJ*K^-1 x 0.310 K = 0.359 kJ = heat

kJ / moles = molar heat
0.359 kJ / (2g / 65.12 g/mole) = molar heat = 0.011 kJ/mole