Question

Define the term specific heat and molar specific heat .Give their C.G.S and S.I units.

Answer 1

Heat capacity (Cv) of a material is the amount of energy needed for the raise of one degree Celsius (or kelvin). Hence, it goes as Joules/Kelvin.

Now. Any “specific” property, in thermodynamics, is an intensive property (Which means, as you know, is any property independent of it’s measuring parameter). And here, mass is the “measuring parameter”.

Specific heat capacity (cv) of a material is, thus, the energy needed to raise one unit mass of that material through one degree Celsius (or kelvin). Hence it goes as Joules/(Kelvin*kilogram)

As already answered, Cv= mass*cv.

Extra- Specific volume is the volume per unit mass (unit- cubic metres/kilogram)