What do you mean by 1 degree celsius of rise in temperature equal to 1 kelvin of rise in temperature of a substance?

Answer 1

1 kelvin and 1 celsius degree are both exactly the same thing ... a unit of temperature, equal to 1/100 of the difference between the freezing and boiling points of water. The only difference between the Kelvin scale and the Celsius scale is that they start from different temperatures ... the Celsius number starts from the freezing point of water, whereas the Kelvin scale starts from 'absolute zero'. So the Kelvin temperature will always be 273.15 more than the Celsius temperature ... because it starts at 273.15 lower. But when the temperature changes by some number of Celsius degrees, it changes by exactly the same number of Kelvins, because 1 Kelvin is exactly the same size as 1 Celsius degree.

Answer 2

In the Celsius and Kelvin temperature scales, a change of 1 degree Celsius is equivalent to a change of 1 Kelvin. The Kelvin scale starts at absolute zero, where there is no thermal energy, and does not have negative values like Celsius. This relationship allows for easy conversion between the two scales by simply adding or subtracting 273.15.