AP Electochemistry/Thermodynamics

Which of the following is the equation that relates the free energy change to the value of the reaction quotient for a reaction? ΔG =

• ΔG = ΔG° + RT ln Q

• ΔG = ΔG° - RT ln Q

• ΔG = -RT ln K

Which of the following is the equation that relates the equilibrium constant to the standard free energy change for a reaction?

• ΔG = ΔG° + RT ln Q

• ΔG = ΔG° - RT ln Q

• ΔG = -RT ln K

What is the value of ΔG° for a reaction in which K = 1?

• ΔG° = 0

• ΔG° ≠ 0

The reaction 2NO2(g) ⇌ 2NO4(g) has ΔG°298 = -5.40 kJ per mole of NO4. The reaction will proceed to the right.

• True

• False

In the copper-silver cell, why must the Cu2+ and Ag+ solutions be kept in separate containers? Select the single best answer.

• Otherwise Ag+ ions would be reduced directly by Cu metal and no external current would be produced.

• The electrons flow away from the anode and towards the cathode.

In a galvanic cell, do electrons travel from anode to cathode or from cathode to anode? The electrons flow away from the anode and towards the cathode.

• True

• False

Oxidation is defined as ________ loss of an electron.

• gain of an electron.

• loss of an electron.

Which statement is true concerning an oxidation-reduction reaction? The reactant which is oxidized is the reducing reagent.

• True

• False

Which of the following involves reduction? CrO42-(aq) yields Cr3+(aq)

• True

• False

In order for an oxidation reaction to occur, a reduction reaction must also take place.

• True

• False