Book: KE & R: 21 Flashcards

1
Q

Relating the spontaneity of a process to the sign of the cell potential.

A

E_cell > 0 for a spontaneous process

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Relating electric potential to energy and charge in SI units.

A

Potential = energy / charge or 1 V = 1 J / C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Relating standard cell potential to standard electrode potentials in a voltaic cell.

A

Eº_cell = Eº_cathode(reduction) - Eº_anode(oxidation)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Defining the Faraday constant.

A

F = 9.65×10⁴ J / V mol e⁻

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Relating the free energy change to the cell potential.

A

∆G = -n F E_cell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Finding the standard free energy change from the standard cell potential.

A

∆Gº = -n F Eº_cell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Finding the equilibrium constant from the standard cell potential.

A

Eº_cell = ( R T ln( K ) ) / ( n F )

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Substituting known values of R, F, and T into equation Eº_cell = ( R T ln( K ) ) / ( n F ) and converting to a common logarithm.

A

Eº_cell = ( 0.0592 V / n ) log K or log K = n Eº_cell / 0.0592 V

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Calculating the nonstandard cell potential (Nernst equation).

A

E_cell = Eº_cell - RT ln Q / n F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Substituting known values of R, F, and T into the Nernst equation and converting to a common logarithm.

A

E_cell = Eº_cell - ( 0.0592 V / n ) log Q

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Relating current to charge and time.

A

current ( A ) = charge ( C ) / time ( s )

How well did you know this?
1
Not at all
2
3
4
5
Perfectly