In the "What is the Initial Temperature of the Hot Water?" investigation, you were asked to determine the initial temperature of a sample of water by using thermodynamic relationships. Use this method to solve the following question. The temperature of 50.0 g of hot water in a calorimeter decreases to 45.0 °C after adding 30.0 g of 20 °C cold water. What was the temperature of the hot water in the calorimeter before adding the cold water? [The specific heat of water is 4.184 J/g °C.]
a. 38°C
b. 44°C
c. 83 °C
d. 76 °C
e. 60°C