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प्रश्न
One mole of an ideal gas is expanded isothermally and reversibly to half of its initial pressure. ΔS for the process in JK−1 mol−1 is ______.
[ln 2 = 0.693 and R = 8.314, J/(mol K)]
पर्याय
6.76
5.76
10.76
8.03
MCQ
रिकाम्या जागा भरा
उत्तर
One mole of an ideal gas is expanded isothermally and reversibly to half of its initial pressure. ΔS for the process in JK−1 mol−1 is 5.76.
Explanation:
For the isothermal process (ΔT = 0)
ΔS = `"R" ln "P"_1/"P"_2`
= 8.314 ln 2
= 8.314 × 0.693
= 5.76
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