All Flashcards
What are the key differences between thermodynamically favorable and unfavorable reactions?
Favorable: ΔG° < 0, K > 1, spontaneous | Unfavorable: ΔG° > 0, K < 1, nonspontaneous.
What are the differences between voltaic and electrolytic cells?
Voltaic: Spontaneous redox reaction, produces electricity | Electrolytic: Nonspontaneous redox reaction, requires electricity.
What is the effect of a positive ΔG° on a reaction's spontaneity?
The reaction is nonspontaneous and requires an external energy source to proceed.
What is the effect of coupling a nonspontaneous reaction with a highly spontaneous reaction?
If the spontaneous reaction's negative ΔG° is large enough, the overall coupled reaction becomes spontaneous.
What is the effect of multiplying a reaction by a coefficient on its ΔG° value?
The ΔG° value is multiplied by the same coefficient.
What is the effect of adding two reactions together?
The ΔG° values of the two reactions are also added together to find the ΔG° of the overall reaction.
What is the effect of using an external power source on a nonspontaneous reaction in an electrolytic cell?
The external power source provides the necessary energy to drive the nonspontaneous reaction forward.
In the electrolytic cell diagram, what is the role of the 'External Power Source'?
The external power source provides the energy needed to drive the non-spontaneous redox reaction.
In the reaction intermediate diagram, what is the role of 'O'?
'O' is an intermediate, produced in one step and consumed in a subsequent step.