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!!

2nd law with entropy how do you calculate Gibbs free energy Cell potential equation overall cell reaction

#2 Which of the following definitions matches the term?

non-spontaneous is...

1 joule of work / coulomb of charge transferred J/C = units reduction happens, gaining electrons 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. thermodynamically unfavorable

#3 Which of the following terms matches the definition?

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

overall cell reaction 3rd law of thermodynamics overall cell reaction galvanic cell

#4 Which of the following definitions matches the term?

cell potential, Ecell, electromotive force (emf)

delta G and the energy of the product is lower than that of the reactants 1. G = negative = k>1; G = positive = k 1 joule of work / coulomb of charge transferred J/C = units as temperature goes to zero, entropy approaches a constant value products have less energy than reactants, spontaneous, graph will end lower than it started

#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

charging a battery vs using a battery volumes proportionality with entropy galvanic cell vs electrolytic cell what is Gibb's free energy

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

oxidation half-reaction

as V goes up, so does S as the more temperature, the more energy, the mor entropy

True

False

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

anode

a reaction can be coupled with a reaction that is favorable to push it forward Examples: - photosynthesis - ATP - Charging a battery with electricity

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

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

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

galvanic cell

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

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)

cell potential, Ecell, electromotive force (emf)

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

Section 2: True/false questions

oxidation half-reaction

as V goes up, so does S as the more temperature, the more energy, the mor entropy

anode

a reaction can be coupled with a reaction that is favorable to push it forward Examples: - photosynthesis - ATP - Charging a battery with electricity

voltage equation

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

cathode

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!!

galvanic cell

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

Triple-checked your answers?

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