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For a phase change, H = -44 kJ/mol and SO = -0.12 kJ/(K•mol). What are
G and the spontaneity of the phase change at 350 K?​

Respuesta :

superman1987

Answer:

ΔG = - 2.0 kJ/mol and the reaction is spontaneous.

Explanation:

∵ ΔG = ΔH - TΔS,

ΔH = - 44.0 kJ/mol, T = 350.0 K, ΔS = - 0.12 kJ/K.mol.

∴ ΔG = ΔH - TΔS = (- 44.0 kJ/mol) - (350.0 K)(- 0.12 kJ/K.mol) = - 2.0 kJ/mol.

The sign of ΔG assigns the spontaneity of the reaction:

  • If ΔG is negative: the reaction is spontaneous.
  • If ΔG = 0, the reaction is at equilibrium.
  • If ΔG is positive: the reaction is non-spontaneous.

∵ ΔG has a negative value, so the reaction is spontaneous.

  • So, the answer is:

ΔG = - 2.0 kJ/mol and the reaction is spontaneous.

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