Question

Calculate mass of water originally in the calorimeter.

A 52.81−g sample of water at 84.2°C is added to a sample of water at 23.3°C in a constant-pressure calorimeter. If the final temperature of the combined water is 40.1°C and the heat capacity of the calorimeter is 26.3 J/°C, calculate the mass of the water originally in the calorimeter.