Answer to Question #316404 in General Chemistry for Ash

Question

Dissolving 2.93 g of CaCl₂(s) in 144.0 g of water in a calorimeter at 23.3°C causes the temperature to rise to 27.2°C. What is the approximate amount of heat (in J) evolved during the dissolution, assuming the heat capacity of the resulting solution is 4.180 J/g°C?

Answer 1

• We will use the formula $Q=mcΔt$
• where m is mass, c is specific heat capacity and the last part is change in temperature.
• 2.93 * 3.06 *300.35 = 2692.88J