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If we use different gases in constant volume gas thermemetre why does the reading vary plzz explain

If we use different gases in constant volume gas thermemetre why does the reading vary plzz explain

Grade:11

1 Answers

Chetan Mandayam Nayakar
312 Points
9 years ago

The known properties of gases allow for the accurate measurement of temperature using a constant-volume thermometer. Gas is sealed and kept at a constant volume. As temperature changes, the volume or pressure of the gas changes. The amount of pressure required to maintain a constant volume of the gas indicates temperature.

consider ideal gas: PV=nRT,T=PV/nR. n,V and R are constants which is the same for all gases. In addition, the equation is obeyed under all conditions. For a real gas van der Waal's equation states that: (P+(an2/V2)(V-nb)=nRT. each gas has a different value of a and b. This is the reason why the reading varies.

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