I have to find delta G from a problem.
Not the standard free energy, from the change in engery. So this delta G does not have the degree sign above.
The equation i used was deltaG=standard G+RTlnQ
If deltaG was a positve number, what does that tell me.
I know that if the standard free energy is a positive number, it tells me that the reaction is not a product favored. So whats the difference between standard free energy and the change in free energy.
If I understand the question, the standard free energy, delta G^o, is the free energy of formation from the elements at 25 C. The free energy of a reaction is the free energy of the products minus the free energy of the reactants.
The difference between standard free energy (ΔG°) and the change in free energy (ΔG) lies in the conditions in which they are calculated.
Standard free energy (ΔG°) is determined under standard conditions, which include a temperature of 298 K (25°C), a pressure of 1 atm, and 1 M concentrations for all reactants and products. It represents the free energy change when all reactants and products are in their standard states.
On the other hand, change in free energy (ΔG) takes into account the actual concentrations and conditions of the reaction. It can be calculated using the equation ΔG = ΔG° + RT ln(Q), where ΔG° is the standard free energy change, R is the gas constant (8.314 J/(mol·K)), T is the temperature in Kelvin, and Q is the reaction quotient which is calculated using the actual concentrations of the reactants and products.
If ΔG is a positive number, it tells us that the reaction is non-spontaneous under the given conditions. This means that the products have higher free energy than the reactants and the reaction does not occur spontaneously in the forward direction. In order for the reaction to proceed, an input of energy is required.
It is important to note that the sign of ΔG does not determine the rate at which a reaction will occur. The rate of a reaction is determined by factors such as the activation energy and the presence of catalysts.