1. The problem statement, all variables and given/known data What is the heat capacity of water in J*g*°C 2. Relevant equations A 74.8 sample of copper at 143.2g is added to an insulated vessel containing 165ml of water, Density of water = 1.00 at 25.0 °C. The final temperature is 29.7° C The specific heat of copper is 0.385 J*g*°C. 3. The attempt at a solution g of water =165g quantity of heat= mass of substance * specific heat* temperature change heat capacity = C (mass of substance * specific heat) quantity of heat of copper = 74.5g*0.3858(29.7-143) =-3.268*10^-3 so, isnt this the same quantity of heat of water? if so, this how i tried to do it 165g of h2o* specific heat*(29.7-25)= 3.268*10^-3 specific heat =4.2147 so, 165*4.21= 700... but thats wrong, the right answer is 74.5g HELP PLEASE!