DAT General Chemistry Equation Sheet
Thermodynamics/Thermochemistry
Electrochemical Cells
Law of Thermodynamics: = +
st
1
Standard Cell Potentials
ɛ° = ɛ°
+ ɛ°
ɛ° = ɛ°
+ ɛ°
Work: = −
ℎ
Calorimetry: =
=
Nernst Equation (non-standard cell potentials)
0.0592
= ° −
log
= ℎ
= ℎ
q = heat added or removed from system
m = mass
Faraday’s Law (quantitative calculations)
∗
∗
Entropy
=
∗
=
−
>
>
>
∗
=
∗
Enthalpy
I = current,
( > 0) – Endothermic
= time in seconds, n = moles, F = Faraday’s
constant (96485
⁄
), Q = reaction quotient
( < 0) – Exothermic
Enthalpies of Formation:
= °
− °
,
,
Nuclear Reactions
Bond Dissociation Energy
st
Kinetics (always 1
order)
=
−
=
−
−
=
0
k = reaction constant
ln = ln
−
Gibbs Free Energy
0
= ° + (
nonstandard conditions, Q = reaction
)
Nuclear Binding Energy:
quotient
m = mass
2
° = −
=
c = speed of light
° = ° − °
( must be in kg)
Standard Conditions
All aqueous species @ 1M, all gaseous species @1 atm, T=298k
Standard Temperature and Pressure
T = 273K, P = 1 atm