Properties Of Solids And Liquids Question 482

Question: The volume of a gas at 20°C is 100 cm3 at normal pressure. If it is heated to 100°C, its volume becomes 125 cm3 at the same pressure, then volume coefficient of the gas at normal pressure is [Pb. PET 2002; DPMT 2001]

Options:

A) 0.0015/°C

B) 0.0045/°C

C) 0.0025/°C

D) 0.0033/°C

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Answer:

Correct Answer: D

Solution:

$ \frac{V _{1}}{V _{2}}=\frac{1+\gamma t _{1}}{1+\gamma t _{2}} $

therefore $ \frac{100}{125}=\frac{1+\gamma \times 20}{1+\gamma \times 100} $

therefore g = 0.0033/°C



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