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.

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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