Nonstandard free energy changes | Applications of thermodynamics | AP Chemistry | Khan Academy

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The standard change in free energy, ΔG°, for a reaction applies only when the reactants and products are in their standard states. In all other circumstances, we must consider the nonstandard free energy change, ΔG, which can be calculated from ΔG° using the equation ΔG = ΔG° + RTlnQ. In this equation, R is the appropriate gas constant (8.314 J/mol·K), T is the temperature in kelvin, and Q is the reaction quotient. View more lessons or practice this subject at https://www.khanacademy.org/science/a...

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