Practice question · Select all that apply
Which statements about Gibbs free energy are correct?
Hints
- Three concern position; one concerns speed.
- Nothing in the Gibbs equation carries information about an activation barrier.
Show the answer
- A. It equals zero at equilibrium
- B. It relates to the equilibrium constant by
- C. A negative value indicates a spontaneous process at constant T and P
Why
Gibbs energy gives the direction, the equilibrium condition and the link to . It says nothing whatever about rate, which belongs to kinetics.
Practise Gibbs Free Energy and Spontaneity
The app has 4 more questions on this lesson, and keeps your place in the course. Chemistry I is free to start.
More questions on Gibbs Free Energy and Spontaneity
- Diamond converts to graphite with Δ G < 0 at room temperature, yet diamonds do not visibly change. What does…
- A reaction has Δ H = +30 kJ/mol and Δ S = +100 J/mol/K. Set the temperature in kelvin above which it becomes…
- Sort each combination of signs by when the reaction is spontaneous.
- Gibbs free energy isolates the spontaneity criterion to system properties alone, yet it remains…
- A reaction with a positive enthalpy change can still be spontaneous.
- Complete the account of what Gibbs free energy does and does not tell you.
- Match each quantity to what it determines.