A constant volume thermometer registers pressure of 1.500 × ‘Pa at the triple point of water and a pressure of 2.050 × ‘Pa at the normal boiling point. What is the temperature at the normal boiling point?

373.318K

Explanation:

Given,

Pressure at boiling pointP_bp, is 2.050 × Pa

Pressure at triple point pointP_tp, is 1.500 × Pa

Formula used

At constant volume(V), the relation between the temperature ( and

pressure () of a volumetric thermometer can be represented as,

or

where is a constant

The temperature at triple point pressure () of water is standardized as, 273.16K. By comparing values at two states, the above equation can be written as,

Where,

Subscripts 'tp' and 'bp' represents triple point and boiling point respectively.

So, the temperature at the Boiling point,

Substituting the values in the above formula, we get

Or,

Hence, temperature at normal Boiling point, (Ans.)