In a calorimeter containing 500 g of water at a temperature of 10 degrees Celsius, put 80 g of ice at a temperature

In a calorimeter containing 500 g of water at a temperature of 10 degrees Celsius, put 80 g of ice at a temperature of 0 degrees Celsius. How much heat would the water give off when it cools down to 0 degrees Celsius?

500 g of water = 0.5 kg the amount of heat is found by the formula Q = c * m * (t-t1) where c is the specific heat capacity, m is the mass, (t-t1) is the difference between temperatures. s = 4200 J / kg * s, Q = 4200 * 0.5 * (10-0) = 21000 J
answer: 21 kJ