Could use some help with chem hmwk, thanks?

A 0.005 mol sample of C2H4 (MM 28 g/mol) is burned in a bomb calorimeter containing 500 grams of water at an initial temperature of 20.00°C. After the reaction, the final temperature of the water is 22.76°C. The heat capacity of the calorimeter is 420 J/°C. Using these data, calculate the heat of combustion of... show more A 0.005 mol sample of C2H4 (MM 28 g/mol) is burned in a bomb calorimeter containing 500 grams of water at an initial temperature of 20.00°C. After the reaction, the final temperature of the water is 22.76°C.
The heat capacity of the calorimeter is 420 J/°C. Using these data, calculate the heat of combustion of C2H4 in kJ/mol.
Cs water = 4.18 J/g°C
(Ans -1386 kJ/mol)
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