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NEETChemistryThermodynamics (C)

Two processes are mentioned- (a) Throwing a stone from the ground to roof. (b) (½) H 2 (g) + (½) Cl 2 (g) ⇌ HCl(g) ; ∆ r H ⊖ = –92.32 kJ mol –1 In which of the processes potential energy/enthalpy change is contributing factor to the spontaneity?

Options

  1. AAmongst those two processes, in the reaction [A], enthalpy change (i.e. ΔH) is a contributing factor to the sp
  2. BIn both the processes,potential energy/enthalpy change is contributing factor to the spontaneity
  3. CAmongst those two processes, in the reaction [B], enthalpy change (i.e. ΔH) is a contributing factor to the sp
  4. DIn none of the processes,potential energy/enthalpy change is contributing factor to the spontaneity.

Correct answer

C. Amongst those two processes, in the reaction [B], enthalpy change (i.e. ΔH) is a contributing factor to the sp

Step-by-step solution

Correct Option is : (C) Amongst those two processes, in the reaction [B], enthalpy change (i.e. ΔH) is a contributing factor to the spontaneity, as negative value of enthalpy change favours the negative value of gibbs free energy change, which led to the spontaneous reaction.

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