Question

If 22 g of water is heated so that the water temperature rises from 18.1°C to 21.5°C, how many calories have been absorbed by the water?
The specific heat of water = 1.00 cal / (g · °C)

Answer 1

22g *(21.5-18.1)*1.00cal/g*C

Answer 2

When water is mixed with acetonitrile in a calorimeter, the temperature of the solution decreases because