What 3 factors affect the rate of a chemical reaction? A mechanism for a natural

Question

What 3 factors affect the rate of a chemical reaction? A mechanism for a naturally oncoming reaction that destroys ozone is. Step 1 O_3(g) + HO(g) rightarrow HO_2(g) + O_2(g) Step 2: HO_2(g) + O(g) rightarrow HO(g) + O_2(g) Which species is a catalyst and what type of catalysis is occurring, homogeneous or heterogeneous? Match the letter on the diagram to the term it represents. Energy of the products Activation Energy DF. between products and reactants Energy of the reactants Which of the following statements is false regarding the equilibrium constant, K_c? K_c for a reaction at a particular temperature always has the same value. K_c for the reverse reaction is the negative of K_c for the forward reaction. The numerical value of Kc depends on the form of the balanced equation. When quoting K_c it is customary to omit units. Which statement about the equilibrium constant is true? The value of K_c changes as product concentration changes. changes as reactant concentration changes, changes as temperature changes, never changes.

Explanation / Answer

1) The three factors which affect the rate of a chemical reaction are:

a) The concentration of reactants that is with increase in the amount of the reactants of a reaction the rate of the reaction increases.

b) The temperature that is the reaction rate increases with increase the temperature of the reaction.

c) The catalyst that isin the presence of a catalyst the rate of the reaction increases considerably.

2) One of the characteristics of a catalyst is that it is regenerated on completion of the reaction. Here, itcan be seen that OH radical is utilized in the first step and regenerated in the second step hence, OH radical is the catalyst. Since, in the above reaction bothe the reactants and the catalyst are in the same phase thatis gas phase hence, the reaction is Homogeneous catalysis.

3) According to the diagram,

The Energy of the products is given by the energy at which products are formed that is D.

Activation energy is the height from the energy of reactants to the energy barrier that is B.

The Energy of the reactants is given by the energy at which reactants are formed that is A.

The difference between the energy of reactants and the products is given by DE and on the given diagram it is represented by C.

4) It is not necessary to omit the units while writing the Kc since usually, the concentration units cancel out each other. Thus, the correct option is (D).

5) The Kc of a reaction depends upon the temperature therefore, when temperature changes Kc also changes. Hence, the corect option is (C).

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