Question

Assertion (A): When ice melts to form water at 0°C, the latent heat of fusion is contained in the liquid water.

Reason (R): Ice has highest specific latent heat of fusion whose magnitude is 336 kJ kg⁻¹.

Options

• Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).

• Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).

• Assertion (A) is false, but Reason (R) is true.

• Assertion (A) is true, but Reason (R) is false.

Answer 1

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).

Explanation:

When ice melts at 0°C, the heat absorbed is stored as potential energy in the liquid water, so A is true. Ice does have the highest specific latent heat of fusion, 336 kJ kg⁻¹, so R is also true. However, R only gives the value of the latent heat; it does not explain that this heat is stored in the liquid water.