2015年11月13日 · The Gibbs Free Energy (delta G) is equal to the enthalpy (delta H) minus the temperature in Kelvin times the entropy (delta S). This serves as a measurement of whether or not a reaction will spontaneously occur.

2015年9月14日 · Delta G naught prime means that the pH is 7 (physiologic conditions) everything else is the same. The concentration of [H+] now isn't 1 molar because 1 molar concentration would be an extremely low pH (0). Delta G naught prime is just like Delta G naught but for biology.

2014年7月27日 · If you want to calculate DeltaG under non-standard conditions, you need to use the equation DeltaG = DeltaG^0 + RTlnQ where Q is the ratio of concentrations (or activities) of the products divided by the reactants. Under standard conditions Q=1 and DeltaG=DeltaG^0. Under equilibrium conditions, Q=K and DeltaG=0 so DeltaG^0=-RTlnK.

2017年3月18日 · Enthalpy change The change in enthalpy is equal to the energy supplied as heat at constant pressure. The equation ΔG=ΔH−TΔS gives the free energy change accompanying a process. The sign of free energy change tells as whether the process is spontaneous or not and it depends on the enthalpy and entropy and temperature of the system. If ΔH is positive heat …

2016年5月3日 · So, in terms of $\Delta G^0$, we end up with:$$\frac{dG}{d\xi}=\Delta G^0+RT\ln{Q}$$ This equation shows that, on a graph of G versus $\xi$, the right hand side represents the slope. The slope becomes equal to zero, and equilibrium prevails, when the reaction has proceeded to the extent that Q = K, where K is the equilibrium constant.

2015年12月8日 · I see it in different way. You are right in most textbooks $\Delta G^0$ means free energy change at $25~\mathrm{^\circ C}$ but in this case you have to think in a different way. I see it as segregation of pressure and temperature dependence. $$\Delta G(T,P)=\Delta G^0 (T)+RT\ln(K_\mathrm{eq})$$ At equilibrium you must have $\Delta G(T,P)=0$

2014年8月17日 · As the title states, what is the name of the equation $$\\Delta G=\\Delta G^{\\circ}+RT \\ln Q$$ My textbook does not explicitly state the name and I could not find anything on google.

2017年7月18日 · You'd start from the expression for the change in Gibbs' free energy, DeltaG, relative to a reference, DeltaG^@, at standard pressure and a convenient temperature: DeltaG = DeltaG^@ + RTlnQ where: Q is the reaction quotient for the current state of the reaction. R and T are known from the ideal gas law. RTlnQ describes the shift in the free energy in reference to …

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2018年11月28日 · I want to understand the derivation between gibbs energy and equillibrium constant $$\Delta G=\Delta G^o+RT\ln Q?$$ I have seen a similar post on CSE Derivation of relationship between equilibrium constant and Gibbs free energy change which seems to be incomplete and still confusing so I am again asking this question.