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# A Gas Thermometer Measures the Temperature from the Variation of Pressure of a Sample of Gas. - Physics

Answer in Brief

A gas thermometer measures the temperature from the variation of pressure of a sample of gas. If the pressure measured at the melting point of lead is 2.20 times the pressure measured at the triple point of water, find the melting point of lead.

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#### Solution

Given:
In a gas thermometer, the pressure measured at the melting point of lead, P = 2.20 × Pressure at triple point(Ptr)
So the melting point of lead,(T) is given as:

T = P/P_(tr) × 273.16  K

=> T = (2.20 ×P_(tr))/P_(tr) × 273.16 K

⇒ T =2.20 × 273.16 K

⇒  T = 600.952 K

⇒ T ≅  601 K

Therefore, the melting point of lead is 601 K.

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#### APPEARS IN

HC Verma Class 11, Class 12 Concepts of Physics Vol. 2
Chapter 1 Heat and Temperature
Q 3 | Page 12
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