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What are the processes of Gibbs free energy? How does it work? Please include links if you can. Help would be much appreciated! Gibbs free energy simply combines entropy and enthalpy. Enthalpy accounts for changes in internal energy and work done by expansion. Suppose though that you opened a bottle of perfume and allowed it [...]

During a phase change, there is no change in temperature. Below 273 degrees the reaction moves forward, and above 273 it moves backwards. How can this be proven/understood in terms of using free energy?? (If delta G is positive, the reaction moves spontaneously backwards) I’m not so sure if my answer will fully answer your [...]

What combination of delta H and delta S values always produces a negative free-energy change? ΔG = ΔH – T.ΔS When ΔS is positive and ΔH is negative, a process is always spontaneous (ΔG < 0). addthis_url = ‘http%3A%2F%2Fwww.yourownenergy.com%2Ffree-energy%2Fwhat-combination-of-delta-h-and-delta-s-values-always-produces-a-negative-free-energy-change’; addthis_title = ‘What+combination+of+delta+H+and+delta+S+values+always+produces+a+negative+free-energy+change%3F’; addthis_pub = ”;

i was asked this and i wasn’t sure why Gibbs free energy is better when it is in a biological system, can any one help me out? Gibbs free energy is a combination of both energy and entropy considerations. Biological or not – this is THE indicator of spontanity of a chemical reaction. addthis_url = [...]

Consider these hypothetical chemical reactions: 1. A <—> B, Delta G = 12.6 kJ/mol 2. B <—> C, Delta G = -28.4 kJ/mol 3. C <—> D, Delta G = 7.60 kJ/mol What is the free energy, Delta G, for the overall reaction, A <—> D? Express your answer numerically in kilojoules per mole. The [...]

What is the Gibbs free energy change for an electrochemical cell where the cell potential is 0.16 volts and the overall process transfers 3 electrons? Answer in units of kJ/mol. Funny, just solved this one The equation is delta G = -nFE so its delta G = (-3)(96485)(.16) which would give u -46312.8 since its [...]

C3H8(g) + 5O2 (g)=3CO2(g) + 4H2O(g) Delta H_rxn = -2217kJ Delta S_rxn = 101.1 J/K. I believe it is spontaneous, just can’t calculate the free energy change. Change in free energy is given by the formula. delta G = delta H – T ( delta s) delta G = -2217 -( 286 K )* (101.1) [...]