Cell Potential: Output of a Voltaic Cell 21.3 - 21.4

equilibrium

When the switch is closed and no reaction is occurring, each

half-cell is in an _ state

kinetic

A VOLTAIC cell converts the delta G of a spontaneous redox reaction

into the energy of electrons.

voltage

Cell potential is also called the of the cell

pos

Ecell is _ for a SPONTANEOUS PROCESS

zero

The standard hydrogen electrode has a standard electrode

potential defined as

oxidizing

The more POS the E°value, the more readily the reactant

will act as an agent.

reducing

The more NEG the E°value, the more readily the reactant

will act as an agent.

pos

The oxidizing agent is the reactant from the half-reaction with

the more _ E° half cell

reducing

Metals that can displace H2 from acid are metals that are

stronger _ agents than H2 .

active

The more negative the E° half-cell of a metal, he more _it is

reduce

Any metal that has a more negative E°value will ____the ion of a metal higher up the list.

For a SPON RXN

• delt G ____ 0
• K _ 1
• E cell _ 0

=, =, =

For a EQ RXN

• delt G ____ 0
• K _ 1
• E cell _ 0

, <, <

For a non SPON RXN

• delt G ____ 0
• K _ 1
• E cell _ 0

When is E cell > E° cell

• Q ___ 1
• R ___ P
• ln(Q) ____ 0

=, =, =

When is E cell = E° cell

• Q ___ 1
• R ___ P
• ln(Q) ____ 0

,

When is E cell < E° cell

• Q ___ 1
• R ___ P
• ln(Q) ____ 0

concentration

A ____ cell exploits the effect of concentration

changes on cell potential.

noyt

As long as the concentrations of the solutions are DIFF,

the cell potential is _ 0 and the cell can do work.

0

When the anode and cathode are the same compound and have the same concentration, the cell potential is