What is the SI units for specific heat capacity?

Answer 1

The unit for specific heat if Joules per kilogram per kelvin (Jkg-1K-1)

Now kg and K are both already SI units for mass and temperature respectively. But the Joule is the unit of energy which is not an SI unit; it is a derived unit.

Now energy= force x distance = Newtons x meters

So now we have Joules being equal to newton x meters. but the newton is also a derived unit for the quantity of force

Force = mass x acceleration = kg x ms-2

Now we have everything in SI unit form:

Joules = (force) x (distance) => From this we get:

Joules = (kgms-2) x (m) = kgm2s-2

Now specific heat = Jkg-1K-1 ; Substituting the values for Joules:

Thus we arrive at specific heat = (kgm2s-2) x (kg-1) x (K-1)

Expanding: m2s-2K-1 (the (kg) x (kg-1) cancel out each other.)

Answer 2

SI units for specific heat capacity is joule per kilogram kelvin (J/kg,K).

Answer 3

In the SI the unit of heat capacity is J/K.