Question

3. Which equation shows the relationship between the Kelvin and Celsius temperature scales? K = 273 – °C K = °C + 273 K = °F + 273 K = °C + °F

Answer 1

Answer: $K=\°C+273.15$

Explanation:

The Kelvin ($K$), is the unit of temperature of the scale created by the British physicist William Thomson (Lord Kelvin) in 1848, taking as a base the Celsius scale, establishing the zero point for this scale in the absolute zero which is in $-273.15\°C$.

This was achieved by observing that when a gas cools, its volume decreases proportionally to its temperature. That is, for each degree of temperature that the gas decreases, its volume also decreases by a certain percentage.

After which, Kelvin made the calculations and it turned out that at a temperature of $-273.15\°C$ the volume of the gas would be zero (theoretically).

It should be noted that the Kelvin is the unit of temperature of the International System of Units and that although the scale starts at absolute zero (theoretical), in which no molecule should move, in reality it is not so, because according to quantum physics, at this temperature the molecules retain a residual movement.