CHEMISTRY COMMUNITY

Is there any difference between G and G knot or do they represent the same thing?

G knot just means that it is only applicable when the elements in the equation are in their standard state since the knot denotes that it is the Gibbs free energy value at standard state.

G naught is explicitly for elements in their standard state.

G knot means that the elements in the equation are in their standard state.

G naught is used for elements in their standard states under normal conditions. G is used for nonstandard conditions.

This equation also relates G and G

G knot is under standard conditions

G knot indicates that the substances in the equation are all in their standard or most pure states. You will get different answers when solving for either G or G knot but they can be related using the equation mentioned before in another answer.

G knot is for when everything is in its standard state.
An equation that relates the two terms is deltaG=deltaGknot + RTlnQ

is when the reaction is under standard conditions meaning that the temperature is at 25 C and the pressure is at 1 atm
Regular G is for any temperature and for any pressure

G Knot is for when the things are at standard state in the world. G is just the G at that specific states.

G is the general term; G knot refers to G under standard state conditions (usually 1 atm and 25 degrees Celsius).

G, or more specifically, delta G, is used in a spontaneous reaction with the energy released that is able to be used as work.

However, delta G is the free energy in a standard state condition.To calculate this, you can use it as a state function by adding or subtracting as a Hess Type approach or from the standard free energy of formation of reactants and products.

Similar to entropy and enthalpy, G knot is G at standard conditions.

G knot is under standard conditions. G is the total so it will include G knot

Gerald Bernal1L wrote:G knot just means that it is only applicable when the elements in the equation are in their standard state since the knot denotes that it is the Gibbs free energy value at standard state.

This is true, and also normally when referring to equilibrium constants (K) and equilibrium quotients (Q); Gnot is when the system is at equilibrium and G is when the system isn't at equilibrium.