Q. 5

The pressure of the gas in a constant volume gas thermometer is 70 kPa at the ice point. Find the pressure at the steam point.

Answer :

95.6 kPa.

Explanation:


Given,


The pressure at ice point, P1, is 70kPa


Formula Used


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


K (eqn. 1)


K (eqn. 2)


K (eqn. 3),


Where,


subscripts 1 and 2 in the above equations represents the ice point and steam point respectively. So,





By dividing (eqn. 3) by (eqn. 2),



Or,





P2=95.6 kPa(Ans.)


Hence the pressure at steam point is 95.6 kPa≈96 kPa


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