Question

S.I unit of specific heat capacity is

• A. Joule per kilogram per kelvin
• B. Joule per kilogram per second
• C. Degree Celsius per joule per second
• D. All

Answer 1

Answer: (A)

Joule per kilogram per kelvin

Specific heat capacity of a substance is the heat required to raise the temperature of unit mass of substance through $1^{o}C$ or $1K$, given by:

$c=Q/m\Delta t$ ,

If $m=$kg (SI unit of mass), $\Delta t=K$ (SI unit of temperature)

$Q=$joule (SI unit of heat energy)

Then, $c=joule/kg\times K=$ joule per kilogram per kelvin

This is the SI unit of specific heat.