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Question

During an experiment, an ideal gas is found to obey a condition = constant [ρ = density of the gas]. The gas is initially at temperature T, pressure P and density ρ. The gas expands such that density changes to

Options

A.The pressure of the gas changes to √2P.
B.The temperature of the gas changes to √2 T.
C.The graph of the above process on the P-T diagram is parabola.
D.The graph of the above process on the P-T diagram is hyperbola.

Solution

Equation of process ⇒ = constant = C    .... (1)
Equation of State                  ..........(2)
From 1 and 2         PT = constant    ⇒   C is false, D is true.
As ρ-changes to     ⇒   P changes to from equation (1) ⇒   A is false.
Hence T changes to . ⇒   B is true.

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