These two units measure different types of quantities. kcal/mol is a measurement of energy per mole. Degree celcius is a measure of temperature. However, you can think of temperature as representing a certain amount of thermal energy. To figure out the thermal energy available at a certain temperature, just convert the temperature to kelvin then multiply by R (the gas constant ~8.31J/mol*K). Then just convert joules to kcal (1 cal = 4.19J, 1 kcal=1000 cal)