Answer :


Explanation:


Given


Pressure at triple point of water, Ptp, is 40kPa


Boiling point of water, T, is 100°C


Formula used


The relation connecting the temperature ( and pressure () of a volumetric thermometer can be represented as,



Which leads us to the relation,


K


where,


Ptp = Pressure at triple point of water= 40kPa


Here, we have to find the pressure at temperature 100°C (i.e, 373.15K),


So substitute, T= 373.15K in the above equation




i.e., (Ans.)


Hence, the pressure measured at the boiling point of water is 54.64 kPa≈56 kPa


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