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At the equilibrium of reversible reaction, if any of the factors (temperature, pressure and concentration) is changed, the position of the equilibrium will shift in such a direction that the effect of change of factors is relieved.
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A+B--->C+D+Energy
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Or, A+B--->C+D; ∇H=-ve
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Temperature increase
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Temperature decrese
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Rate of forward reaction<Rate of backward reaction
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Rate of forward reaction>Rate of backward reaction
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Equilibrium shift left ward
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Equilibrium shift right ward
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Product concentration decrease
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Product concentration increase
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N2+3H2--->2NH3
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Total mol more on left side
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Pressure increase
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Pressure decrease
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Rate of forward reaction>Rate of backward reaction
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Rate of forward reaction<Rate of backward reaction
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Equilibrium shift right ward
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Equilibrium shift left ward
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Product concentration increase
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Product concentration decrease
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PCl5--->PCl3+Cl2
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Total mol more on right side
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Pressure increase
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Pressure decrese
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Rate of forward reaction<Rate of backward reaction
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Rate of forward reaction>Rate of backward reaction
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Equilibrium shift left ward
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Equilibrium shift right ward
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Product concentration decrease
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Product concentration increase
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H2+I2-‐->2HI
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Total mol equal on both side
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Pressure increase
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Pressure decrease
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No effect
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No effect
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Only applicable for gasses as pressure doesn't affect solid or liquid.
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Reactant--->product
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Concentration increase
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Concentration decrease
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Rate of forward reaction>Rate of backward reaction
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Rate of forward reaction<Rate of backward reaction
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Equilibrium shift right ward
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Equilibrium shift left ward
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Product concentration increase
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Product concentration decrease
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A+B--->C+D-Energy
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Or, A+B--->C+D; ∇H=+ve
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Temperature increase
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Temperature decrese
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Rate of forward reaction>Rate of backward reaction
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Rate of forward reaction<Rate of backward reaction
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Equilibrium shift right ward
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Equilibrium shift left ward
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Product concentration increase
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Product concentration decrease
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