MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryThermodynamics and ThermochemistryPrevious Year Questions
A gas is allowed to expand in a well-insulated container against a constant external pressure of 2.5 atm from an initial volume of 2.50 L to a final volume of 4.50 L. The change in internal energy U of the gas in joules will be (NEET 2017)
A.– 500 J
B.– 505 J✓ Correct
C.+ 505 J
D.1136.25 J
Explanation
U q W Since a container is well insulated q=0 Hence, U W 2.5atm 4.50L 2.50L U W 5.0Latm 5.0Latm 101.33J / Latm 505J x x
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