Chemical Constants and Basic Equations

c = 2.99792458 x 108 m s-1

e = 1.6021773 x 10-19 C

NA = 6.022137 x 1023 mol-1

h = 6.626076 x 10-34 J·s
(Planck's constant)

R (Rydberg) = 3.289842 x 1015 s-1
(this is the real Rydberg constant)

R = 2.1798742 x 10-18 J
(Bohr constant shown in text)

mp = 1.672623 x 10-27 kg

mn = 1.674929 x 10-27 kg

me = 9.109390 x 10-31 kg

R = 0.0820578 L•atm K-1 mol-1 = 8.31451 J K-1 mol-1

amu = 1.660540 x 10-27 kg 

1 atm = 760 torr =101,325 Pa

1 J = 1 V C  = 1 kg m2 s-2 

1 N = 1 kg m s-2 


Kinetic Energy Equation


Coulomb's Law


Lattice Energy Equation


Change in Entropy


Bohr Energy Equation
(for hydrogen atom only!)


(for hydrogen atom only!)
(uses real Rydberg constant)

ΔE = h ν

λ ν = c

1 L•atm = 101.325 J

qp = S.H. x mass x ΔT

ΔG = ΔH - TΔS

ΔGo = -RT lnKeq

ΔGo = - nFEo

ΔG = ΔGo + RT lnQ

E=Eo-(RT/nF)lnQ (Nernst)

RT/F = 0.025693 J C-1

Eo = Eo (cathode) - Eo (anode)

F = 9.648531 x 104 C mol-1

PV = nRT

R = 0.08206 L·atm
 mol·K

R = 62.36 L·torr
      mol·K

1 atm = 760 torr = 101,325 Pa

STP = 1 atm & 0oC

ΔE = q + W

work = - PΔV

ΔH = ΔE + PΔV

1 calorie = 4.184 J

H2O SH = 1 cal/goC

qp (gained) = -qp (lost)

qp = SH x mass x ΔT

qv = Cv x ΔT

oC = (oF-32)/1.8

oF = 1.8oC + 32

K = oC  + 273.15

2.54 cm = 1 in

5280 ft = 1 mile

1.609 km = 1 mile

22.4 L = molar volume @ STP

mega

M

106

centi

c

10-2

nano

n

10-9

kilo

k

103

milli

m

10-3

pico

p

10-12

deci

d

10-1

micro

µ

10-6

Angstrom

Å

10-10 m