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प्रश्न
What is the equilibrium constant Keq for the following reaction at 400 K?
\[\ce{2NOCl_{(g)} ⇌ 2NO_{(g)} + Cl2_{(g)}}\], given that H0 = 77.2 kJ mol−1 and ∆S0 = 122 JK−1 mol−1
उत्तर
T = 400 K; ∆H0 = 77.2 kJ mol−1 = 77200 J mol−1;
∆S0 = 122 JK−1 mol−1
∆G0 = −2.303 RT log Keq
log Keq = `(-∆"G"^0)/(2.303 "RT")`
log Keq = `((-∆"H"^0 - "T"∆"S"^0))/(2.303 "RT")`
log Keq = `-((77200 - 400 xx 122)/(2.303 xx 8.314 xx 400))`
log Keq = `-((28400)/7659)`
log Keq = − 3.7080
Keq = antilog (−3.7080)
Keq = 1.95 × 10−4
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