Question

How much heat is absorbed by 20g granite boulder as energy from the sun causes its temperature to change from 10°C to 29°C? The specific heat capacity of granite is 0.79 J/gºC.

Answer 1

Given :

Mass of granite , m = 20 g .

Change in temperature , $\Delta T=29-10=19^oC$.

Specific heat capacity of granite , $C=0.79\ J/g^oC$ .

To Find :

The heat absorbed by granite .

Solution :

We know , heat absorb is given by :

$\Delta H=mC\Delta T\\\\\Delta H=20\times 0.79 \times 19 \ J\\\\\Delta H=300.2\ J$

Therefore , heat absorb is 300.2 J .

Hence , this is the required solution .