5.1.2 Equilibria
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what is partial pressure
• the pressure gas would exert if it alone occupied the volume occupied by the whole mixture • pressure caused by a basis proportional to the number of particles of the gas
give the partial pressure equation
Pg (partial pressure of gas)/Pt(total pressure)=ng(mols of gas)/Nt(total mols of gas)
describe the effect of increasing temperature on Kc and Kp
• causes the endothermic reaction to be favoured - Kp increases id delta H is positive and decreases if delta H is negative
describe the effect of decreasing temperature on Kc and Kp
• causes the exothermic reaction to be favoured - Kp decreases if delta H is positive and increases if delta H is negative
what is the effect of concentration and pressure on Kp
equilibrium shifts but Kp does not change
what is the effect of catalysts on Kp and Kc
no effect
what is a heterogeneous system
where one or more substance are in a different state to the others in the reaction
what is a homogeneous system
where all substances are in the same state