Lytsy12 Lytsy12

12-11-2016
Advanced Placement (AP)

contestada

An iron bar of mass 869 g cools from 94 C to 5 C . Calculate the heat releases in (Kilojoules) by the metal.

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scme1702 scme1702

15-11-2016

For this question, we apply the equation:
Q = mCp ΔT
Where m is the mass of the substance, Cp is its specific heat capacity and ΔT is the temperature change.
Q = 896 x 0.45 x (5 - 94)
Q = -35884.8 Joules
So about -36 kilojoules of heat is released.

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