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24/09/2021 4:01 pm
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One mole of an ideal gas at 300 K is expanded isothermally from an initial volume of 1 litre to 10 litres. The ΔE for this process is (R = 2 cal mol-1 K-1)
(a) 163.7 cal
(b) zero
(c) 1381.1 cal
(d) 9 lit atm
1 Answer
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24/09/2021 4:03 pm
Correct answer: (b) zero
Explanation:
For a finite change ΔE = CvΔT.
For an isothermal process ΔT = 0. Hence ΔE = 0