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, Ecell, electromotive force (emf) Cell potential equation if a reaction is thermodynamically favorable what is Gibb's free energy

#2 Which of the following terms matches the definition?

thermodynamically unfavorable

non-spontaneous is... is H < 0 and S > 0 non-spontaneous is... is H < 0 and S < 0

#3 Which of the following definitions matches the term?

overall cell reaction

chemical energy is converted to electrical energy with spontaneous redox reaction Voltage consists of oxidizing agent in one compartment that pulls electrons through a wire from a reducing agent as temperature goes to zero, entropy approaches a constant value (sum of S products) - (sum of S reactants) DO NOT FORGET TO ACCOUNT FOR THE MOLES IN THE REACTION!!! y + z --> Y+ + Z- (G<0)

#4 Which of the following terms matches the definition?

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

how do you calculate Gibbs free energy cell potential, Ecell, electromotive force (emf) is H < 0 and S < 0 oxidation half-reaction

#5 Which of the following terms matches the definition?

galvanic = anode is negative and cathode is positive electrolytic = anode is positive and cathode is negative

galvanic cell vs electrolytic cell cathode cell potential, Ecell, electromotive force (emf) how do you calculate Gibbs free energy

#6 Determine if the following combination is true or false.

oxidation half-reaction

x --> X+ + e-

True

False

#7 Determine if the following combination is true or false.

anode

the energy of a system related to changes in enthalpy and entropy, at a constant temperature. basically implies that the system is at 1 atm and using 1 M solutions.

True

False

#8 Determine if the following combination is true or false.

voltage equation

delta G and the energy of the product is lower than that of the reactants 1. G = negative = k>1; G = positive = k

True

False

#9 Determine if the following combination is true or false.

cathode

reduction happens, gaining electrons

True

False

#10 Determine if the following combination is true or false.

galvanic cell

galvanic = anode is negative and cathode is positive electrolytic = anode is positive and cathode is negative

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 = anode is negative and cathode is positive electrolytic = anode is positive and cathode is negative

Section 2: True/false questions

oxidation half-reaction

x --> X+ + e-

anode

the energy of a system related to changes in enthalpy and entropy, at a constant temperature. basically implies that the system is at 1 atm and using 1 M solutions.

voltage equation

delta G and the energy of the product is lower than that of the reactants 1. G = negative = k>1; G = positive = k

cathode

reduction happens, gaining electrons

galvanic cell

galvanic = anode is negative and cathode is positive electrolytic = anode is positive and cathode is negative

Triple-checked your answers?

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