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  4. Assertion Specific heat capacity and molar specific heat capacity both have same units. Reason Specific heat capacity and molar specific heat capacity both do not depend on mass.

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Q. Assertion Specific heat capacity and molar specific heat capacity both have same units.
Reason Specific heat capacity and molar specific heat capacity both do not depend on mass.

Thermodynamics

Solution:

Specific heat capacity $s=\frac{\Delta Q}{m \Delta T}$,
where $m$ is mass of substance. Its SI unit is $Jkg ^{-1} \,K ^{-1}$.
Molar specific heat capacity $C=\frac{\Delta Q}{\mu \Delta T},$
where $\mu$ is number of moles. Its SI unit is $Jmol ^{-1} \,K ^{-1}$.
Both of these are constants characteristics of a substance and are independent of its mass. Therefore, Assertion is incorrect but Reason is correct.