Question

Which units express heat capacity?
J/°C, J/K, cal/°C, cal/K
J/(gi°C), J/(giK), cal/(gi°C), cal/(giK)
J, cal
°C, K

Answer 1

Heat capacity has units of energy per temperature. From your list those are:

- J/°C, J/K, cal/°C, cal/K (all are units of heat capacity; SI unit = J/K)

Notes:
- J/(g·°C) or J/(g·K) and cal/(g·°C) etc. are units of specific heat capacity (per unit mass), not total heat capacity.
- J or cal alone are units of energy, and °C or K are temperature units — neither by themselves are heat capacity.