Calculating change in entropy with °C or K.

[rmiller70015]

Homework Statement

[/B]
I was given a graph in the PV plane of a cyclic process and asked to find some quantities, one of them is the change in entropy for the system. I just had a question about the units.

Homework Equations

dS = C_Vln(T_f/T_i)

The Attempt at a Solution

The data was given in Celsius, should I convert to kelvin when I put it into this equation?

 

[haruspex]

should I convert to kelvin

Absolutely.

 

[DrClaude]

The only time you can use °C is when you calculate a ΔT.

 

[rmiller70015]

Thank you everyone.