Kelvin or celcius?

[006248274]

Are there any equations where the units HAVE to be celcius and any which HAVE to be kelvin? Or is does any unit work for all equations?

[Annie 1H]

Most equations use kelvin, such as the equation for entropy, gibbs free energy. You should also always use the units according to the specific problem. I think one equation we can use celsius is for mcdeltaT when solving for heat given a heat capacity of J/g*ºC, but generally, check the units for the problem since heat capacity could also be given in J/g*K

[Sarah N 1E]

Usually we never use celsius and always have to convert to kelvin.