Question

What is the energy change when the temperature of 10.9 grams of solid aluminum is decreased from 36.7 degrees celsius to 20.0 degrees celsius

Answer 1

The specific thermal capacity of Al is $c = 0.902~\frac{\text{J}}{\text{g}\cdot\degree\text{C}};$

${\Delta}Q = cm{\Delta}t = 0.902~\frac{\text{J}}{\text{g}\cdot\degree\text{C}}~*~10.9~\text{g}~*~(36.7-20.0)~\degree\text{C} \approx 164.19~\text{J}.$