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 is H < 0 and S < 0 exergonic reaction

#2 Which of the following terms matches the definition?

thermodynamically unfavorable

galvanic cell vs electrolytic cell if a reaction is kinetically favorable non-spontaneous is... 1st law of thermodynamics

#3 Which of the following terms matches the definition?

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

overall cell reaction how K and G relate to each other 2nd law with entropy charging a battery vs using a battery

#4 Which of the following definitions matches the term?

cell potential, Ecell, electromotive force (emf)

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!! 1 joule of work / coulomb of charge transferred J/C = units 1 joule of work / coulomb of charge transferred J/C = units as temperature goes to zero, entropy approaches a constant value

#5 Which of the following definitions matches the term?

galvanic cell vs electrolytic cell

charging = non-spontaneous using = spontaneous galvanic = anode is negative and cathode is positive electrolytic = anode is positive and cathode is negative 1 joule of work / coulomb of charge transferred J/C = units 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

#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 temperature goes to zero, entropy approaches a constant value

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

charging = non-spontaneous using = spontaneous

True

False

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

galvanic cell

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

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

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

cell potential, Ecell, electromotive force (emf)

galvanic cell vs electrolytic cell

Section 2: True/false questions

oxidation half-reaction

x --> X+ + e-

anode

as temperature goes to zero, entropy approaches a constant value

voltage equation

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

cathode

charging = non-spontaneous using = spontaneous

galvanic cell

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

Triple-checked your answers?

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