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Question
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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