How much energy, in joules, is released when 17 kilograms of granite is cooled from 45°c to 21°c?

"In order to solve this problem you will use the specific heat equation Q = m x C x change in T. ""Q"" represents the amount of energy gained or lost. ""m"" is for mass. ""C"" is the specific heat and ""T"" is the amount of degrees gained or lost. The specific heat of materials is a constant, so you will need the specific heat value for granite which is 0.803 J/gC. Because the specific heat is using the mass unit of grams, you need to convert 17 kg into grams which is 17,000 g. Now plug your numbers into the equation.  
Q = 17000 x 0.803 x (-24) your final answer will be -327,624. The granite lost 327,624 Joules of energy."

So are u adding some additional catalyst