# If the temperature a substance increases from 20 to 35 Celsius, what is the total temperature change on the Kelvin scale?

You can use the conversion, which is 273.15 Kelvin = zero degrees Celsius. Since it's a relative scale, ${1}^{0}$ C = 274.15 K, and ${2}^{0}$ C = 275.15 and so forth. This isn't really useful in your calculation, because you're just trying to evaluate the total temperature change, which will always be equal when comparing Celsius and Kelvin. It gets a little trickier when involving Fahrenheit units.