Thermodynamics

Thermodynamics

Question

For a particular reversible reaction at temperature T, ΔH and ΔS were found to be both +ve. If Te is the temperature at equilibrium, the reaction would be spontaneous when 

  • Te>T

  • T >Te

  • Te is 5 times T

  • T=Te

Answer

A.

Te>T

For a particular reversible reaction at T temperature
ΔG = ΔH-TΔS
When ΔH, S is positive
ΔG = +ΔH- T (+ΔS)
For a spontaneous process, ΔG must be negative, it is possible only at high temperature.
That mean T> Te

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