Answer to Question #87486 in General Chemistry for jay

Question

A student determines the heat of dissolution of solid magnesium chloride using a coffee-cup calorimeter of negligible heat capacity.

When 0.480 g of MgCl2(s) is dissolved in 101.00 g of water, the temperature of the solution increases from 25.00 to 26.99 °C. Based on the student's observation, calculate the enthalpy of dissolution of MgCl2(s) in kJ/mol. Assume the specific heat of the solution is 4.184 J/g°C.

ΔHdissolution = _______ kJ/mol

Answer 1

ΔHdissolution = 166.364 kJ/mol