Quiz on unit 9 must knows

#1 Which of the following terms matches the definition?

Ecell = E (cathode) - E (anode) IMPORTANT: if the reaction gets reversed (in order to balance, sometimes it will need to be reversed), the sign of the Ecell must switch, however if it gets multiplied (in order to balance) IT REMAINS THE SAME!!

Cell potential equation is H < 0 and S > 0 if a reaction is kinetically favorable Cell potential equation

#2 Which of the following terms matches the definition?

thermodynamically unfavorable

non-spontaneous is... entropy Cell potential equation non-spontaneous is...

#3 Which of the following definitions matches the term?

overall cell reaction

Ecell = E (cathode) - E (anode) IMPORTANT: if the reaction gets reversed (in order to balance, sometimes it will need to be reversed), the sign of the Ecell must switch, however if it gets multiplied (in order to balance) IT REMAINS THE SAME!! a reaction can be coupled with a reaction that is favorable to push it forward Examples: - photosynthesis - ATP - Charging a battery with electricity y + z --> Y+ + Z- (G<0) (sum of S products) - (sum of S reactants) DO NOT FORGET TO ACCOUNT FOR THE MOLES IN THE REACTION!!!

#4 Which of the following terms matches the definition?

1 joule of work / coulomb of charge transferred J/C = units

cell potential, Ecell, electromotive force (emf) overall cell reaction exergonic reaction non-spontaneous is...

#5 Which of the following definitions matches the term?

True

False

Section 1: Multiple Choice questions

Ecell = E (cathode) - E (anode) IMPORTANT: if the reaction gets reversed (in order to balance, sometimes it will need to be reversed), the sign of the Ecell must switch, however if it gets multiplied (in order to balance) IT REMAINS THE SAME!!

thermodynamically unfavorable

overall cell reaction

1 joule of work / coulomb of charge transferred J/C = units

galvanic cell vs electrolytic cell

Section 2: True/false questions

oxidation half-reaction

x --> X+ + e-

anode

T = 500k spontaneous, high temperature, T delta S is large

voltage equation

y + z --> Y+ + Z- (G<0)

cathode

products have less energy than reactants, spontaneous, graph will end lower than it started

galvanic cell

S = entropy G = Gibbs free energy H = heat energy

Triple-checked your answers?

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