When 23.6 g of calcium chloride, CaCl₂ (110.98 g/mol), was dissolved in water in a constant-pressure calorimeter, the temperature rose from 25.0 °C to 38.7 °C. If the heat capacity of the solution and the calorimeter is 1258 J/°C, what is the enthalpy change when 0.710 mol of calcium chloride dissolves in water? The solution process is
CaCl₂ (s) → Ca²⁺ (aq) + 2Cl⁻ (aq)
