Question

The SI unit of specific latent heat is:

• A. $J{g}^{-1}$
• B. $cal{g}^{-1}$
• C. $Jk{g}^{-1}$
• D. $Jk{g}^{-1}{K}^{-1}$

Answer 1

The correct option is C

$Jk{g}^{-1}$

Explanation for correct option:

(c) $Jk{g}^{-1}$

• Specific latent heat is the amount of heat energy that is required to change the state of a unit mass of a substance.
• Its SI unit is$Jk{g}^{-1}$.

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Explanation for incorrect option:

(a) $J{g}^{-1}$

It is the unit of thermal heat capacity.

(b) $cal{g}^{-1}$

It is not the unit of any physical quantity.

(d) $Jk{g}^{-1}{K}^{-1}$

It is the SI unit of specific heat.

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The SI unit of specific latent heat is $Jk{g}^{-1}$. Hence, the correct answer is option (c).