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.

Taking into account the definition of calorimetry, the heat absorbed is 300.2 J.

In first place, calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is the amount of heat exchanged by a body without affecting its molecular structure. If you don't change the molecular structure, you don't change the state of aggregation. Since the molecular structure does not change, a change in temperature is observed.

In other words, sensible heat is the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).

So, the equation that allows to calculate heat exchanges is:

Q = c× m× ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case:

Replacing in the expression to calculate heat exchanges:

Q= 0.79× 20 g× 19 C

Solving:

Q= 300.2 J

In summary, the heat absorbed is 300.2 J.

Learn more:

Given :

Mass of granite , m = 20 g .

Change in temperature , .

Specific heat capacity of granite , .

To Find :

The heat absorbed by granite .

Solution :

We know , heat absorb is given by :

Therefore , heat absorb is 300.2 J .

Hence , this is the required solution .

i just learnt this recently but i need to look through my notes again

i think it's c. i'm not sure but i think so.