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 equation G, S, H Cell potential equation 1st law of thermodynamics

#2 Which of the following terms matches the definition?

thermodynamically unfavorable

is H < 0 and S > 0 is H < 0 and S < 0 anode non-spontaneous is...

#3 Which of the following definitions matches the term?

overall cell reaction

y + z --> Y+ + Z- (G<0) S = entropy G = Gibbs free energy H = heat energy in an isolated system energy can neither be created or destroyed; only transferred or converted, meaning E lost = negative E gained as V goes up, so does S as the more temperature, the more energy, the mor entropy

#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) cell potential, Ecell, electromotive force (emf) galvanic cell

#5 Which of the following definitions matches the term?

galvanic cell vs electrolytic cell

delta G = delta H - (T * delta S) gibbs free energy = enthalpy - (temperature times entropy) *note T is in kelvin, not Celsius G = negative = k>1 G = positive = k<1 k is close to 1, G is close to zero k is far from 1, G is far from zero galvanic = anode is negative and cathode is positive electrolytic = anode is positive and cathode is negative S = entropy G = Gibbs free energy H = heat energy

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

oxidation half-reaction

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.

True

False

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

anode

oxidation happens, losing electrons

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

(sum of S products) - (sum of S reactants) DO NOT FORGET TO ACCOUNT FOR THE MOLES IN THE REACTION!!!

True

False

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

galvanic cell

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

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

overall cell reaction

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

galvanic cell vs electrolytic cell

Section 2: True/false questions

oxidation half-reaction

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.

anode

oxidation happens, losing electrons

voltage equation

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

cathode

(sum of S products) - (sum of S reactants) DO NOT FORGET TO ACCOUNT FOR THE MOLES IN THE REACTION!!!

galvanic cell

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

Triple-checked your answers?

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