1. An empty calorimeter had a mass of 18.2531 grams. When water having a temperature of18.7 \deg C was added, the calorimeter plus water was found to have a mass of 69.1045 grams. A quantity of water having a temperature of 73.4 \deg C was added to the cooler water, and the temperature at the instant of mixing was determined to be 45.5\deg C. The mass of the calorimeter plus the mixture of warm and cool water was 123.4651 grams.Determine the heat capacity of the calorimeter.