All Equations Flashcards
Moles equation
n = m / Mr
n = Moles
m = mass
Mr = relative atomic mass
Concentration, moles and volume equation
c = n / v
Concentration = mol dm^3
Volume = dm^3
Molar gas volume
V = n x 24
Number of particles
= n x avogadro’s constant
Atom economy
= Mr of desired product / Sum of Mr of all reactants X 100
Ideal gas equation
pV = nRT
p = pressure (Pa)
V = volume (m^3)
n = moles
R = 8.314 J K^-1 mol^1
T = K ( from Celsius to K add 273)
Percentage yield
= actual yield / theoretical yield x 100
Enthalpy change
Q = mcAT
Q = heat energy
m = mass
c = specific heat capacity
AT = change in temperature
Average bond enthalpy
AH = sum of bond enthalpies in reactants - sum of bond enthalpies in products
EMF
Electrode potential of right hand side - electrode potential of left hand side
Gibbs free energy
AG = AH - TAS
AG = Gibbs free energy
AH = Enthalpy change
T = Temperature
AS = change in entropy
Equilibrium Constance wrt concentration
Kc = [D]^d x [E]^e / [A]^a [B]^b
Equilibrium constant wrt pressure
Kp = (D)^d x (E)^e / (A)^a x (B)^b
Rate equation
Rate = k[A]^m [B]^n
Arrhenius equation
k = Ae^-Ea/RT
Or
lnk = -Ea/RT + lnA
