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The values of ΔH and ΔS for the reaction, C(graphite) + CO2 (g) → 2CO(g) are 170 kJ and 170 JK–1, respectively. This reaction will be spontaneous at [2009]
  • a)
    910 K
  • b)
    1110 K
  • c)
    510 K
  • d)
    710 K
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
The values of ΔH and ΔS for the reaction, C(graphite) + CO...
ΔG = ΔH – T Δ S At equilibrium, ΔG = 0
⇒ 0 = (170 × 103J) – T (170JK– 1)
⇒ T = 1000 K
For spontaneity, ΔG is – ve, which is possible only if T > 1000 K.
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The values of ΔH and ΔS for the reaction, C(graphite) + CO2 (g) → 2CO(g) are 170 kJ and 170 JK–1, respectively. This reaction will be spontaneous at [2009]a)910 Kb)1110 Kc)510 Kd)710 KCorrect answer is option 'B'. Can you explain this answer?
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