Quiz on unit 9 must knows

#1 Which of the following definitions matches the term?

Cell potential equation

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!! it has k>1, relatively low activation energy as V goes up, so does S as the more temperature, the more energy, the mor entropy y + z --> Y+ + Z- (G<0)

#2 Which of the following definitions matches the term?

non-spontaneous is...

as temperature goes to zero, entropy approaches a constant value T = 500k spontaneous, high temperature, T delta S is large products have less energy than reactants, spontaneous, graph will end lower than it started thermodynamically unfavorable

#3 Which of the following terms matches the definition?

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

overall cell reaction how a reaction that is thermodynamically unfavorable occur Cell potential equation oxidation half-reaction

#4 Which of the following terms matches the definition?

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

charging a battery vs using a battery cell potential, Ecell, electromotive force (emf) entropy non-spontaneous is...

#5 Which of the following definitions matches the term?

galvanic cell vs electrolytic cell

galvanic = anode is negative and cathode is positive electrolytic = anode is positive and cathode is negative T=100k spontaneous, low temperature, T delta S is small 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 products have less energy than reactants, spontaneous, graph will end lower than it started

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

oxidation half-reaction

T=100k spontaneous, low temperature, T delta S is small

True

False

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

anode

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

True

False

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

voltage equation

**V = IR voltage = current (amps) * resistance (ohms)**

True

False

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

cathode

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

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

galvanic cell

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

True

False

Section 1: Multiple Choice questions

Cell potential equation

non-spontaneous is...

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

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

galvanic cell vs electrolytic cell

Section 2: True/false questions

oxidation half-reaction

T=100k spontaneous, low temperature, T delta S is small

anode

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

voltage equation

**V = IR voltage = current (amps) * resistance (ohms)**

cathode

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

galvanic cell

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

Triple-checked your answers?

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