Homework Answers
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.
1. A catalyst affects the rate of a chemical reaction by a. providing an alternate reaction...
1. A catalyst affects the rate of a chemical reaction by a. providing an alternate reaction pathway with a lower activation energy. b. decreasing the energy difference between the reactants and products. c. increasing the number of collisions between the reactants. d. increasing the average kinetic energy of the reactants.
8. The rate law for the reaction H2O2 + 2H+212 + 2H2O is rate-k[H202][1]. The following...
8. The rate law for the reaction H2O2 + 2H+212 + 2H2O is rate-k[H202][1]. The following mechanism has been suggested. H2O2+1 - HOI + OH - slow OH + H H20 fast HỘI + H+ + + I2 + H2O fast Identify all intermediates included in this mechanism. A) H and I D) Honly B) H and HOI E) H20 and OH C) HOI and OH 9. Which of the following statements is false? A) A catalyst increases the rate...
Effect of Catalyst en Rate of Chemical Reacties Time for Reaction 8 Would you expoct the...
Effect of Catalyst en Rate of Chemical Reacties Time for Reaction 8 Would you expoct the astivation energy for the cataly nod reaction to be greater ohan, less than, or equal to the activaion energy Sor the uncacally nod reaction? Why?
A catalyst is a material that affect the rate of chemical reaction, yet emerges unchanged from...
A catalyst is a material that affect the rate of chemical reaction, yet emerges unchanged from the reaction. For example, consider the reaction: A + B C + D in which =-kCCB Where B is a catalyst. The reacrion is taking place in a semibatch reactor, in which 100 ft' of a solution containing 2 lb mol/ft of Ais initially present. No B is present initially. Starting at timet 0,5 ft/min of a solution containing 0.5 lb mol/ft of B...
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.
Which one of the following statements is true? O A catalyst alters the equilibrium constant of...
Which one of the following statements is true? O A catalyst alters the equilibrium constant of a reaction and is neither a product nor a reactant in the overall equation. In order for a reaction to occur, product and reactant molecules must collide with each other. The transition state is a short-lived, high energy state, intermediate between products and reactants. In reactions that are first order in one reactant and first order in another, the slow step always involves a...
2. A catalyst is a substance that speeds up a chemical reaction, while it does not...
2. A catalyst is a substance that speeds up a chemical reaction, while it does not undergo chemical change and is not part of the chemical equation for this reaction. a. True b. False
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....
Select the factors that might influence the rate of a chemical reaction. changing the concentration of...
Select the factors that might influence the rate of a chemical reaction. changing the concentration of reactants reaction rate cannot change adding a catalyst changing the temperature
8. The rate law for the reaction H2O2 + 2H+212 + 2H2O is rate-k[H202][1]. The following mechanism has been suggested. H2O2+1 - HOI + OH - slow OH + H H20 fast HỘI + H+ + + I2 + H2O fast Identify all intermediates included in this mechanism. A) H and I D) Honly B) H and HOI E) H20 and OH C) HOI and OH 9. Which of the following statements is false? A) A catalyst increases the rate...
Effect of Catalyst en Rate of Chemical Reacties Time for Reaction 8 Would you expoct the astivation energy for the cataly nod reaction to be greater ohan, less than, or equal to the activaion energy Sor the uncacally nod reaction? Why?
A catalyst is a material that affect the rate of chemical reaction, yet emerges unchanged from the reaction. For example, consider the reaction: A + B C + D in which =-kCCB Where B is a catalyst. The reacrion is taking place in a semibatch reactor, in which 100 ft' of a solution containing 2 lb mol/ft of Ais initially present. No B is present initially. Starting at timet 0,5 ft/min of a solution containing 0.5 lb mol/ft of B...
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 one of the following statements is true? O A catalyst alters the equilibrium constant of a reaction and is neither a product nor a reactant in the overall equation. In order for a reaction to occur, product and reactant molecules must collide with each other. The transition state is a short-lived, high energy state, intermediate between products and reactants. In reactions that are first order in one reactant and first order in another, the slow step always involves a...
2. A catalyst is a substance that speeds up a chemical reaction, while it does not undergo chemical change and is not part of the chemical equation for this reaction. a. True b. False
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....
Select the factors that might influence the rate of a chemical reaction. changing the concentration of reactants reaction rate cannot change adding a catalyst changing the temperature
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