Thermodynamics: Gibbs Free Energy and Spontaneity

More useful energy becomes available to do work.

The reaction is spontaneous in the forward direction.

Gibbs free energy is the amount of 'free' or 'available' energy a system possesses to do work, whereas enthalpy is the total energy of a system.

<p>ΔG is zero.</p> Signup and view all the answers

<p>A negative ΔH and a positive ΔS.</p> Signup and view all the answers

<p>A negative ΔG° indicates a spontaneous reaction, while a positive ΔG° indicates a non-spontaneous reaction.</p> Signup and view all the answers

<p>Entropy (ΔS) helps to determine the spontaneity of a reaction by indicating the change in disorder or randomness of the system.</p> Signup and view all the answers

<p>ΔG = -RTlnK</p> Signup and view all the answers

<p>ΔG° = -RTln(Keq), where R is the gas constant and T is the temperature in Kelvin.</p> Signup and view all the answers

<p>Products are favoured.</p> Signup and view all the answers

<p>The Kelvin temperature (T) is used to scale the entropy term (ΔS) in the Gibbs equation, allowing for the calculation of ΔG° at a specific temperature.</p> Signup and view all the answers

<p>No, the reaction is not spontaneous at room temperature, as ΔG° = ΔH° - TΔS° = -286 kJ/mol - (298 K)(0.070 J/K·mol) = 34 kJ/mol, which is positive.</p> Signup and view all the answers