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QNEET-2017-Ch-942: NEET 2017 Chemistry - Class 11 NEET-2017-Ch-942 Solution: A gas is allowed to expand in a well insulated container…
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 of the gas in joules will be -500 J -505 J +505 J 1136.25 J
Multiple Choice Options
- A _ 500 J
- B _ 505 J
- C + 505 J
- D 1136.25 J
Step-by-Step Verified Solution
w = - P ext _ V = -2.5(4.50 - 2.50)
_ - 5 L atm = - 5 _ 1.01.325 J = - 506.625 J
_ U = q + w
As, the container is insulted, thus q = 0
Hence, _ U = w = -506.625 J