Chem Notebook COmplete

A increasing the equilibrium constant in favor of products.
B lowering the activation energy required for the reaction to occur.
C raising the temperature at which the reaction occurs.
D increasing the pressure of reactants, thus favoring products.
Chemical Concepts:
The chemical concepts associated with this question are the “catalyst” and “activation energy”.
Activation energy is defined as the minimum amount of energy a reactant needs to obtain in order for
the reaction to take place. This factor is directly affected by a catalyst which is a substance that is
used to lower the activation rate, but is not consumed or used up, in the process. When the energy
required lessens the reaction takes place at a quicker rate, because the time needed to obtain the
necessary amount of energy, is less as the quota is met at a much lower standard.
8 Which reaction diagram shows the effect of using the appropriate catalyst in a chemical reaction?
A
C
B
D
Chemical Concepts:
The chemical concepts associated with this question are the “catalyst” and “activation energy”.
Activation energy is defined as the minimum amount of energy a reactant needs to obtain in order for
the reaction to take place. This factor is directly affected by a catalyst which is a substance that is
used to lower the activation rate, but is not consumed or used up, in the process. When the energy
required lessens the reaction takes place at a quicker rate, because the time needed to obtain the
necessary amount of energy, is less as the quota is met at a much lower standard. This is slightly
comparable to a hiker who intends to scale up a mountain, the energy and time necessary to
accomplish such a feat is much more than that which is needed to climb up a hill. In a sense, what a
catalyst does is convert the mountainous, by comparison, amount of energy and time required into
reaching activation, into a lower, less time and energy draining, requirement.
9 H 2 O 2, hydrogen peroxide, naturally breaks down into H 2 O and O 2 over time. MnO 2 , manganese
dioxide, can be used to lower the energy of activation needed for this reaction to take place and, thus,
increase the rate of reaction. What type of substance is MnO 2 ?
A a catalyst
B an enhancer
C an inhibitor
D a reactant