Question

What are the SI units for specific heat capacity? A. J B. J/ºC C. J/gºC D. J/g

Answer 1

Answer:

C. J/gºC

Explanation:

The specific heat capacity of a substance is defined as the amount of heat energy that must be supplied to 1 kg of a substance in order to increase the temperature of that substance by 1 ºC.

Mathematically, it is calculated as:

$C=\frac{Q}{m\Delta T}$

where

Q is the amount of heat energy supplied to the substance

m is the mass of the substance

$\Delta T$ is the increase in temperature of the substance

We know that:

Q (energy) is measured in Joules (J)

m (mass) is measured in grams (g)

$\Delta T$ (temperature) is measured in Celsius degrees (ºC)

Therefore, the SI units of specific heat capacity are

$[C]=\frac{[J]}{[g][^{\circ}C]}$