Homework Answers
A catalyst is a foreign substance in the reaction (other than the reactants) which alters the rate of reaction without itself undergoing any chemical change.
The catalyst increases the rate of reaction by providing an alternate path for the reaction which requires less activation energy than previously required.
Also as the catalyst doesn't undergo any chemical change its not a part of chemical equation.
Hence the given statement is true.
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2. A catalyst is a substance that speeds up a chemical reaction, while it does not...
1) A catalyst is A) a reactant in a chemical reaction. B) a product in a...
1) A catalyst is A) a reactant in a chemical reaction. B) a product in a chemical reaction. C) a substance that speeds up a reaction without being consumed in the reaction. D) a substance that increases the energy of the products. E) a substance that decreases the energy of the products.
How does a positive catalyst generally affect a chemical reaction? A catalyst increases the temperature of...
How does a positive catalyst generally affect a chemical reaction? A catalyst increases the temperature of the reaction which speeds the reaction rate. A catalyst reduces the frequency factor which speeds the reaction rate. A catalyst reduces the amount of solvent required which slows the reaction rate. A catalyst reduces activation energy which speeds the reaction rate.
Which statement does not describe a catalyst? A) A catalyst may be an inorganic substance. B)...
Which statement does not describe a catalyst? A) A catalyst may be an inorganic substance. B) A catalyst may be an organic substance. A catalyst will decrease the rate of a reaction. A catalyst will increase the rate of a reaction. A catalyst is not used up in the reaction. 4
Which of the following statements is/are correct? 1. A catalyst speeds up a reaction by changing...
Which of the following statements is/are correct? 1. A catalyst speeds up a reaction by changing ∆H, the enthalpy of the reaction 2. Addition of a catalyst to a reaction changes the equilibrium constant 3. A catalyst increases the rates of both the forward and reverse reactions . 3 only B. 2 only C. 2 & 3 only D. none E. 1 & 2 only Which one of the following statements about the overall order of a reaction is correct?...
Are the following questions True or False? part A)A catalyst is the same as an intermediate...
Are the following questions True or False? part A)A catalyst is the same as an intermediate in a reaction mechanism. 1-True 2-False part B)Overall Rate Laws must be determined using experimental data and not the balanced chemical equation. 1-True 2-False
11) Which of the following is true of a catalyst? a) A catalyst is a substance...
11) Which of the following is true of a catalyst? a) A catalyst is a substance b) A catalyst, when added to a reaction system, increases the rate at which the reaction occurs c) A catalyst is neither produced nor consumed as a reaction proceeds d) Both b and c e) Both a and b and c 12) In the Arrhenius equation, the value for A, the pre-exponential factor, depends on a) the collision frequency (number of collisions per unit...
12) Which of the following is true of a catalyst? a) A catalyst is a substance...
12) Which of the following is true of a catalyst? a) A catalyst is a substance b) A catalyst, when added to a reaction system, increases the rate at which the reaction occurs c) A catalyst is neither produced nor consumed as a reaction proceeds d) Both b and c e) Both a and b and c
12) Which of the following is true of a catalyst? a) A catalyst is a substance...
12) Which of the following is true of a catalyst? a) A catalyst is a substance b) A catalyst, when added to a reaction system, increases the rate at which the reaction occurs c) A catalyst is neither produced nor consumed as a reaction proceeds d) Both b and c e) Both a and b and c
Question 35 (1 point) The relationship between the activation energy of the forward and reverse reactions...
Question 35 (1 point) The relationship between the activation energy of the forward and reverse reactions is related by the energy difference between the reactants and products. If the reactants are higher in energy than the products, the activation energy for the forward reaction will be smaller than the activation energy for the reverse reaction and vice versa True False Question 36 (1 point) A catalyst is a substance that is not used up during a reaction. It also does...
2) in a catalyzed chemical reaction, one function of a catalyst is to A) increase the...
2) in a catalyzed chemical reaction, one function of a catalyst is to A) increase the number of successful reactant collisions. B) decrease the concentration of reactants. change the equilibrium concentrations of the products and react D) increase the energy given off during the reaction E) increase the temperature at which the reaction is carried out. 3) Refrigerating perishable foods affects biochemical reactions by A) increasing concentrations of antioxidants. B) removing bacteria. C) decreasing the rate of reactions affecting spoilage....
1) A catalyst is A) a reactant in a chemical reaction. B) a product in a chemical reaction. C) a substance that speeds up a reaction without being consumed in the reaction. D) a substance that increases the energy of the products. E) a substance that decreases the energy of the products.
Which statement does not describe a catalyst? A) A catalyst may be an inorganic substance. B) A catalyst may be an organic substance. A catalyst will decrease the rate of a reaction. A catalyst will increase the rate of a reaction. A catalyst is not used up in the reaction. 4
11) Which of the following is true of a catalyst? a) A catalyst is a substance b) A catalyst, when added to a reaction system, increases the rate at which the reaction occurs c) A catalyst is neither produced nor consumed as a reaction proceeds d) Both b and c e) Both a and b and c 12) In the Arrhenius equation, the value for A, the pre-exponential factor, depends on a) the collision frequency (number of collisions per unit...
12) Which of the following is true of a catalyst? a) A catalyst is a substance b) A catalyst, when added to a reaction system, increases the rate at which the reaction occurs c) A catalyst is neither produced nor consumed as a reaction proceeds d) Both b and c e) Both a and b and c
12) Which of the following is true of a catalyst? a) A catalyst is a substance b) A catalyst, when added to a reaction system, increases the rate at which the reaction occurs c) A catalyst is neither produced nor consumed as a reaction proceeds d) Both b and c e) Both a and b and c
Question 35 (1 point) The relationship between the activation energy of the forward and reverse reactions is related by the energy difference between the reactants and products. If the reactants are higher in energy than the products, the activation energy for the forward reaction will be smaller than the activation energy for the reverse reaction and vice versa True False Question 36 (1 point) A catalyst is a substance that is not used up during a reaction. It also does...
2) in a catalyzed chemical reaction, one function of a catalyst is to A) increase the number of successful reactant collisions. B) decrease the concentration of reactants. change the equilibrium concentrations of the products and react D) increase the energy given off during the reaction E) increase the temperature at which the reaction is carried out. 3) Refrigerating perishable foods affects biochemical reactions by A) increasing concentrations of antioxidants. B) removing bacteria. C) decreasing the rate of reactions affecting spoilage....
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