Question

The specific heat capacity of water is $2.4J{g^{ - 1}}^\circ {C^{ - 1}}$
A. True
B. False

Answer 1

Hint: Specific heat capacity is defined as the amount of the heat by the one gram of the substance that it must absorb or lose to change its temperature by one degree Celsius. The specific heat capacity for the water is highest among all the liquids. That’s why the specific heat of water is taken as a reference for many calculations.

Complete answer:
Hence for the water the specific heat capacity is the amount of the heat required to raise the temperature of the water by one degree Celsius. The amount of the heat to raise the temperature of 1g of water by 1 degree Celsius is known as calorie.

Hence the value of the specific heat capacity of water is one calorie, and one calorie is equal to the $4.184J{g^{ - 1}}^\circ {C^{ - 1}}$. The specific heat capacity of the water is $4.184J{g^{ - 1}}^\circ {C^{ - 1}}$.

Hence the specific heat capacity of the water is not equal to $2.4J{g^{ - 1}}^\circ {C^{ - 1}}$.
Hence the given statement is wrong.

So, the correct answer is “Option B”.

Note:
There is some minor difference between the specific heat capacity and the heat capacity of a liquid. Heat capacity is the ratio between the energy provided to a substance and the corresponding increase in its temperature throughout the specific heat capacity is the amount of the heat required to raise the temperature of the liquid by one degree Celsius. The specific heat capacity can be measured in two units that are “calorie” and $J{g^{ - 1}}^\circ {C^{ - 1}}$, but the SI unit of the specific heat capacity is $J{g^{ - 1}}^\circ {C^{ - 1}}$. Sometimes it is taken as $JK{g^{ - 1}}^\circ {C^{ - 1}}$.