KVPY SX SB Exam 2015 Question Paper

Question : 108 of 120

Marks: +1, -0

The volume vs. temperature graph of 1 mole of an ideal gas is given below

The pressure of the gas (in atm) at X, Y and Z, respectively, are

Solution:

\table \At, X ,V = 50L, T = 200 K;,,,n = 1

P_X={nRT}/V={1×0.0821×200}/50

= 0.328

\At \ Z \ P_Z={1 ×0.0821× 200}/20

=0.821

\At \ YZ \ P_Y={1 ×0.0821× 500}/50

=0.821

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