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!!

what is Gibb's free energy galvanic cell Cell potential equation cathode

#2 Which of the following definitions matches the term?

non-spontaneous is...

y + z --> Y+ + Z- (G<0) thermodynamically unfavorable oxidation happens, losing electrons 1 joule of work / coulomb of charge transferred J/C = units

#3 Which of the following terms matches the definition?

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

voltage equation overall cell reaction volumes proportionality with entropy 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

oxidation half-reaction cell potential, Ecell, electromotive force (emf) charging a battery vs using a battery is H < 0 and S < 0

#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 galvanic = anode is negative and cathode is positive electrolytic = anode is positive and cathode is negative T = 500k spontaneous, high temperature, T delta S is large charging = non-spontaneous using = spontaneous

#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

**delta G = delta H - (T * delta S) gibbs free energy = enthalpy - (temperature times entropy) *note T is in kelvin, not Celsius**

True

False

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

voltage equation

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

True

False

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

cathode

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

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

galvanic cell

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!!

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!!

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

x --> X+ + e-

anode

**delta G = delta H - (T * delta S) gibbs free energy = enthalpy - (temperature times entropy) *note T is in kelvin, not Celsius**

voltage equation

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

cathode

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

galvanic cell

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!!

Triple-checked your answers?

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