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q = m x C x ΔT

q = amount of heat energy gained or lost by substance = 1560 calories

m = mass of sample in grams = 312g

C = heat capacity (calorie/g oC) =?

ΔT = change in temperature = 15 oC

Solve for C

C = q/mΔT = 1560cal/(312g)(15 oC) = 0.33cal/g oC

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