One mole of an ideal monoatomic gas is heated at a constant pressure from 0oC to 100oC. Then the change in the internal energy of the gas is (Given R=8.32Jmol−1K−1)
A
0.83×103J
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B
4.6×103J
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C
2.08×103J
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D
1.25×103J
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Solution
The correct option is D1.25×103J At constant pressure, the change in internal energy of system=nCvΔT =n32RΔT