25.000 grams of water at 45.00oC was added to 25.00 grams of water at 20.30oC in a coffee cup calorimeter. Upon mixing, the equilibrium temperature attained by the system was 31.40oC. The specific heat of water is 4.184 J/goC. What is the calorimeter constant Ccal in J/oC for the coffee cup calorimeter