I understand the working out and everything, but dont understand why they didnt convert temperature change into kevlin and sub the change of temperature (in kelvin) into equations
how can the units of the final answer be kelvin, when they use degree celcius in the calculations
If you mentally plot them on a cartesian plane they have the same gradient just a difference Y-intercept (basically one is calibrated to the freezing point of water, the other is calibrated to absolute zero but the rate of change is the same.
They dont need to be converted when calculating specific heat capacity and latent heat etc. Kelvin is only significant when the equations got to do with ideal gas laws and mean kinetic energy etc as you cant be using negative Celsius etc as that just messes the equations.