Question

If one mole of monoatomic ideal gas expanded from 2 atm to 0.5 atm at 27c, then the entropy change will be

Answer 1

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ΔS = nR ln (P1/P2)

Here symbols have their usual meaning

ΔS = 1× 8.314 ×2.303 ×log 2/0.5

ΔS = 1× 8.314 ×2.303 × log4

ΔS = 1× 8.314 ×2.303 × 0.6

ΔS = 11.488 J k-¹

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