Consider the reaction below at 298 K : C (graphite) + 2H 2 (g) → CH 4 (g) ∆ f Hº (kJ/mol)…

Chemistry · JEE Advanced · NTA ExamsChemical Thermodynamics

Consider the reaction below at 298 K :
C (graphite) + 2H2 (g) → CH4 (g) ∆fHº (kJ/mol) = 74.9
S0m (J/K/mol)
+ 5.6         + 130.7       + 186.3
Which statement below is correct ?
  1. rG0 is – 50.8 kJ and the reaction is driven by enthalpy only.
  2. rG0 is – 50.8 kJ and the reaction is driven by entropy
    only.
  3. rG0 is + 50.8 kJ and the reaction is driven by both
    enthalpy and entropy.
  4. rG0 is – 50.8 kJ and the reaction is driven by both
    enthalpy and entropy.

Answer

(A) ∆ r G 0 is – 50.8 kJ and the reaction is driven by enthalpy only.

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