Question

The boiling point of alcohol is ${78}^{\circ }$C. What is this temperature on Kelvin scale?

Answer 1

Celsius: The Celsius temperature scale is defined by international agreement in terms of two fixed points; the ice point and the steam point. The temperature of the ice point is defined as $0^{\circ }$ Celsius and the steam point as ${100}^{\circ }$ Celsius.

Kelvin: The definition of the Kelvin is the fraction of 1/273.16 of the thermodynamic temperature of the triple point of water. The unit of Kelvin or thermodynamic temperature scale is called the Kelvin.

Thus to convert from Kelvin to degree celsius add 273 to convert from degrees Celsius to kelvin subtract 273 as follows

$K={}^{\circ }$ C +273

or, ${}^{\circ }$C = K + 273

So, ${78}^{\circ }$C = 273 + 78 = 351 K

Hence, temperature of ${78}^{\circ }$C on Celsius scale is equal to 351 K on the Kelvin scale.