Homogenious system
system where all products and reactants are in the same phase
Mole Fraction
No mol of gas A / total no mol of all gasses
MF adds to 1
Partial pressure
mole fraction A x total pressure
Kp equation
products / reactants
A + 2B ⇢ 3C + 4D
Kp= (ppC)3 (ppD)4 / (ppA) (ppB)2
units= (3+4) - (2+1) =7
Kpa^7
Kp scale
Kp< 1:
very small
lots of reactants
equilibrium shifts to left
Kp>1:
very large
lots of products
equilibrium shifts to right
What causes Kp to change
only temperature