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Gibbs Free Energy definitions

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Terms in this set (15)

  • Gibbs Free Energy
    A thermodynamic quantity used to predict the spontaneity of a reaction, calculated as enthalpy minus temperature times entropy.
  • Spontaneous Reaction
    A process that occurs without external energy input, indicated by a negative Gibbs Free Energy.
  • Non-Spontaneous Reaction
    A process requiring external energy input, indicated by a positive Gibbs Free Energy.
  • Equilibrium
    A state where the forward and reverse reactions occur at equal rates, resulting in no net change in the system.
  • Enthalpy
    A measure of the total heat content in a system, often denoted as delta H.
  • Entropy
    A measure of the disorder or randomness in a system, often denoted as delta S.
  • Standard Conditions
    A set of conditions for thermodynamic measurements: 1 atm pressure and 25°C temperature.
  • Reaction Quotient
    A ratio of product concentrations to reactant concentrations, used to determine reaction direction.
  • Gas Constant
    A constant used in thermodynamic equations, typically 8.314 J/(mol·K).
  • Temperature
    A measure of the average kinetic energy of particles in a system, affecting reaction spontaneity.
  • Delta G0
    Gibbs Free Energy change under standard conditions.
  • Delta G
    Gibbs Free Energy change under non-standard conditions.
  • Delta H
    Change in enthalpy during a reaction, indicating heat absorbed or released.
  • Delta S
    Change in entropy during a reaction, indicating change in disorder.
  • High Temperature
    A condition favoring spontaneity when both enthalpy and entropy changes are positive.