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Question

What is delta G in thermodynamics?


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Solution

  1. G in thermodynamics denotes the change in Gibbs Free energy of a chemical reaction.
  2. Gibbs free energy is the amount of total energy present in a thermodynamic system that is used in doing work.
  3. Gibbs free energy is a state function hence it does not depend on the path of reaction.
  4. Change in Gibbs free energy is equal to the difference in change in enthalpy H and product of temperatureT and change in entropy Sof a system. G=H-TS
  5. The above equation is known as Gibbs Helmholtz equation.
  6. If the value of G>0,thereactionisnon-spontaneousandendergonicG<0,thereactionisspontaneousandexergonicG=0,reactionisatequilibrium.


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