Quiz on unit 9 must knows

#1 Which of the following definitions matches the term?

Cell potential equation

entropy of an isolated system is never decreasing, only if it is in a 2 or more system 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 reduction happens, gaining electrons 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!!

#2 Which of the following terms matches the definition?

thermodynamically unfavorable

2nd law of thermodynamics non-spontaneous is... cathode 1st law of thermodynamics

#3 Which of the following terms matches the definition?

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

galvanic cell vs electrolytic cell exergonic reaction overall cell reaction is H > 0 and S > 0

#4 Which of the following terms matches the definition?

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

non-spontaneous is... cell potential, Ecell, electromotive force (emf) Cell potential equation galvanic cell

#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

is H < 0 and S > 0 charging a battery vs using a battery exergonic reaction galvanic cell vs electrolytic cell

#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

as matter disperses, entropy increase, so, going from solid to liquid to gas would increase entropy, whilst going from gas to liquid to solid would decrease it

True

False

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

voltage equation

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

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

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

thermodynamically unfavorable

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

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

as matter disperses, entropy increase, so, going from solid to liquid to gas would increase entropy, whilst going from gas to liquid to solid would decrease it

voltage equation

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

cathode

reduction happens, gaining electrons

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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