12.6 kcal (heat) + Hz(g) + Iz(g) > 2Hl(g) www Equilibrium Shift Stress Reasoning Remove H2 Adding a Catalyst Increase Temperature Decrease Pressure CO2(9) + C(s) <> cO(g) AH=112kJ/mol Stress Equilibrium Reasoning Shift Decrease Temperature Add CO2 Remove CO Increase Pressure
Catalysis and Enzymatic Reactions
Catalysis is the kind of chemical reaction in which the rate (speed) of a reaction is enhanced by the catalyst which is not consumed during the process of reaction and afterward it is removed when the catalyst is not used to make up the impurity in the product. The enzymatic reaction is the reaction that is catalyzed via enzymes.
Lock And Key Model
The lock-and-key model is used to describe the catalytic enzyme activity, based on the interaction between enzyme and substrate. This model considers the lock as an enzyme and the key as a substrate to explain this model. The concept of how a unique distinct key only can have the access to open a particular lock resembles how the specific substrate can only fit into the particular active site of the enzyme. This is significant in understanding the intermolecular interaction between proteins and plays a vital role in drug interaction.
![Use Le Châtelier's Principle to determine in which direction equilibrium will shift in each
scenario. Complete the following charts by writing left, right, or none for the equilibrium shift,
and decreases, increases, or remains the same for the concentrations of reactants and products.
[A, 12:4 each problem set]
Evaluation Rubric
1. Using Le Chatelier's Principle, predict whether the equilibrium shifts towards the reactants (left),
or towards the products (right), or will have no shift, given the following conditions. Justify your
reasoning.
Nz(g) + 3H2(g) > 2NH3(g) + 22.0 kcal (heat)
ww
Stress
Equilibrium
Reasoning
Shift
Add N2
Remove H2
Increase Temperature
Increase Pressure
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