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ΔS for the reaction 1/2 X2 + 1/2 Y2 → XY3, ΔS = 50 - (30 + 60) = -40 J. For equilibrium ΔG = 0 = ΔH - TΔS, T = ΔH/ΔS = 30000/-40 = 750 K

1. ΔS = ΔH/T
2. ΔS = ΔH/T × 273
3. ΔS = ΔH/T × 30000
4. ΔS = ΔH/T × 750 K

Correct answer: ΔS = ΔH/T

Solution

The correct relationship for equilibrium is ΔG = 0, which gives ΔS = ΔH/T. The other options incorrectly modify the equation.

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