Temperature Scales

The temperature scale used in Europe is the Celcius scale, named after Anders Celsius. A temperature using this scale is given in degrees Celcius (${}^\circ$C). Anders Celcius has defined his scale so that 0${}^\circ$C is close to the melting point of ice and 100${}^\circ$C is roughly the boiling point of water. Nevertheless, the choice of the zero point is arbitrary, so that it is not well suited for heat theory calculations. Another scale, namely the Kelvin scale, has therefore become established in heat theory. The zero point of this scale corresponds to a temperature at which particles no longer have thermal motion, i.e. this specific value, which is $273.15^\circ$C below the zero point of the Celcius scale, cannot be deceeded. Since the increment between the values of this scale is identical to the Celcius one, the following formula can be used to convert the two scales: $$T[{}^\circ\mathrm{C}] = T[\mathrm{K}] + 273.15^\circ\mathrm{C}$$ If, on the other hand, one calculates with temperature differences, the Celcius values ​​can be used directly due to the identical increment: $$\Delta T[\mathrm{K}] = \Delta T[{}^\circ \mathrm{C}]$$ Due to this connection, a previous conversion from degrees Celcius to Kelvin is not necessary for temperature differences.