Question

75600J of thermal energy is needed to raise the temperature of a 2.0kg block of ice removed from a freezer at−18∘ C to its melting point.
Calculate the specific heat capacity of ice suggested by these figures.

Answer 1

Energy needed to change the temperature of the object of mass $m$ with specific heat capacity $c$ by $\Delta T$ is $Q = c m \Delta T$.

From the last formula, specific heat capacity is $c = \frac{Q}{m \Delta T} = \frac{75600 J}{2 kg \cdot 18^{\circ} C} = 2100 \frac{J}{kg ^{\circ}C}$ .