Introduction to Gibbs free energy | Applications of thermodynamics | AP Chemistry

Introduction to Gibbs free energy | Applications of thermodynamics | AP Chemistry | Khan Academy

Рет қаралды 62,477

2 жыл бұрын

Keep going! Check out the next lesson and practice what you’re learning:
.www.khanacadem...
The standard Gibbs free energy change, ΔG°, indicates the thermodynamic favorability of a physical or chemical process. When ΔG° is negative, the process is thermodynamically favored. For a given process, the value of ΔG° can be calculated directly from the values of ΔH° and ΔS° using the following equation: ΔG° = ΔH° - TΔS°. View more lessons or practice this subject at www.khanacadem...
Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!
Donate or volunteer today! Donate here: www.khanacadem...
Volunteer here: www.khanacadem...

Пікірлер: 4

@sciencenerd7639 2 жыл бұрын

I am glad to see more chemistry content!

@Eta_Carinae__ 2 жыл бұрын

Since std free energy has constant pressure, ΔH = Q and TΔS = T(ΔQ/T) = Q, so ΔG = Q - ΔQ, right? Wouldn't that just essentially mean reaction direction is entirely determined by the energy lost?

@philipjazz 2 жыл бұрын

If your variables you subsitute for Delta H and Delta G lead you back to the gibbs free energy equation: ΔG = ΔH = TΔS, your equation should be correct! ΔG symbolizes Gibbs energy, when negative the reaction is spontaneous, when positive, the reaction is non-spontaneous ΔH symbolizes change in energy change usually in Joules ΔS symbolizes entropy change or the measure of randomness in a reaction T symbolizes temperature in Kelvins The reaction direction is determined by comparing Q: the reaction quotient, and K the equilibrium constant. When K is greater than Q, the reaction would proceed forward. Hopefully you are given K. I hope this helps! God bless!