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A) C labels the 4, of the reaction are ARof the reaction. B) A labels the...
2 6. Which of the following is true of enzymes? The majority of enzymes are nonspecific...
2 6. Which of the following is true of enzymes? The majority of enzymes are nonspecific b. The majority of enzymes operate under extremely high temperatures e. They are biological catalysts d. They are all irreversible 7. Activation energy is a. Energy that must be added to a reaction started, which is recovered as the reaction proceeds b. Difference in energy between reactants and products c. Energy lost as heat d. free energy 8. Metal ions enhance catalysis by a....
Which statements are true regarding reaction rates? [Select all that apply.] 1.Group of answer choices Larger...
Which statements are true regarding reaction rates? [Select all that apply.] 1.Group of answer choices Larger activation energies are associated with faster reaction rates. 2.Higher reactant concentrations are associated with faster reaction rates. 3.Reducing the activation energy for a reaction increases its reaction rate. 4.Reaction rates depend on how likely molecules are to collide in the correct orientation to react. 5.Reactions that give off heat occur rapidly. Reactions that absorb heat occur rapidly. 6.Large changes in enthalpy are associated with...
As the temperature of a reaction is increased, the rate of the reaction increases because the...
As the temperature of a reaction is increased, the rate of the reaction increases because the A) reactant molecules collide less frequently and with greater energy per collision B) reactant molecules collide with greater energy per collision C) reactant molecules collide less frequently D) activation energy is lowered E) reactant molecules collide more frequently with less energy per collision
Two reactants, A and B are mixed together and the resulting mixture's temperature decreases as the...
Two reactants, A and B are mixed together and the resulting mixture's temperature decreases as the reaction proceeds to produce the products C and D. Is this reaction exothermic or endothermic? Explain Suppose the balanced chemical reaction for the reaction in question (1) is 2A + 38++ C + 2D. If the beat energy absorbed or released by this reaction is [75 k], what is the magnitude heat energy absorbed or released per mole of reactant B? Does the mass...
Il Vodafone - Stay Home 8:51 PM Question 1 of 33 Submit The reaction rate of...
Il Vodafone - Stay Home 8:51 PM Question 1 of 33 Submit The reaction rate of a reaction at 60 °C will greater than at 30°C because – A) the higher temperature leads to greater surface area on solid or liquid reactants. B) the reactants at 60°C will be moving with too great of a speed to collide effectively. C) the activation energy will be lower at 60°C. D) there is a greater proportion of reactants with the necessary kinetic...
26. Activation energy A) is the minimum amount of energy needed to get a reaction started....
26. Activation energy A) is the minimum amount of energy needed to get a reaction started. B) is due to the necessity of collisions between reactants which have enough energy and with the reactants properly oriented. C) can be lowered by catalysts such as enzymes in biochemical reactions. D) A & B E) A, B & C
Question 2 of 10 Which of the following statements concerning the collision theory of reaction rates...
Question 2 of 10 Which of the following statements concerning the collision theory of reaction rates is correct? 1. The activation energy is the difference between the EAHf° (products) and EAHf° (reactants). 2. The activation energy for the forward reaction is the negative of the activation energy for the reverse reaction. 3. The pre-exponential or frequency factor in the Arrhenius equation is a measure of the fraction of reactant molecules having sufficient energy to react. 4. The activation energy of...
48. If the conversion of A to B is slow and B to C is fast, what is the rate equation for this reaction? A) Rate =...
48. If the conversion of A to B is slow and B to C is fast, what is the rate equation for this reaction? A) Rate = K[(CH3CHCI][H20] B) Rate - K[(CH3)2CHCI] C) Rate = K[(CH3)CH] [H0] D) Rate = {[(CH3)2CH] 49. Which of the following statements about a catalyst is true? A) A catalyst accelerates a reaction by changing the amount of reactant and product at equilibrium B) A catalyst accelerates a reaction by lowering the energy of activation...
Given the equilibrium reaction for a general reaction, A+B <->C, explain what happens to the reactants...
Given the equilibrium reaction for a general reaction, A+B <->C, explain what happens to the reactants and products from time until the time at which the A reaction reaches equilibrium. (Choose any that are correct) Concentration (mol.dm-3) B С Time (s) Once products are formed in a reversible reaction, reactans can not be formed At equilibrium both the reactant and product concentration are the same At time 0, there are no products. At equilibrium all concentrations become constant As the...
Most reactions occur by a series of steps. The energy profile for a certain reaction that...
Most reactions occur by a series of steps. The energy profile for a certain reaction that proceeds by a two-step mechanism is shown below. 2 1 Reaction coordinate In regard to the energy profile, identify the following. (a) The positions of reactants and products reaction coordinate for reactants 1 reaction coordinate for products 3 (b) The activation energy for the overall reaction. (Enter your answers in increasing numerical order.) the energy difference between reaction coordinatesSelect and-Select (c) AE for the...
2 6. Which of the following is true of enzymes? The majority of enzymes are nonspecific b. The majority of enzymes operate under extremely high temperatures e. They are biological catalysts d. They are all irreversible 7. Activation energy is a. Energy that must be added to a reaction started, which is recovered as the reaction proceeds b. Difference in energy between reactants and products c. Energy lost as heat d. free energy 8. Metal ions enhance catalysis by a....
As the temperature of a reaction is increased, the rate of the reaction increases because the A) reactant molecules collide less frequently and with greater energy per collision B) reactant molecules collide with greater energy per collision C) reactant molecules collide less frequently D) activation energy is lowered E) reactant molecules collide more frequently with less energy per collision
Two reactants, A and B are mixed together and the resulting mixture's temperature decreases as the reaction proceeds to produce the products C and D. Is this reaction exothermic or endothermic? Explain Suppose the balanced chemical reaction for the reaction in question (1) is 2A + 38++ C + 2D. If the beat energy absorbed or released by this reaction is [75 k], what is the magnitude heat energy absorbed or released per mole of reactant B? Does the mass...
Il Vodafone - Stay Home 8:51 PM Question 1 of 33 Submit The reaction rate of a reaction at 60 °C will greater than at 30°C because – A) the higher temperature leads to greater surface area on solid or liquid reactants. B) the reactants at 60°C will be moving with too great of a speed to collide effectively. C) the activation energy will be lower at 60°C. D) there is a greater proportion of reactants with the necessary kinetic...
26. Activation energy A) is the minimum amount of energy needed to get a reaction started. B) is due to the necessity of collisions between reactants which have enough energy and with the reactants properly oriented. C) can be lowered by catalysts such as enzymes in biochemical reactions. D) A & B E) A, B & C
Question 2 of 10 Which of the following statements concerning the collision theory of reaction rates is correct? 1. The activation energy is the difference between the EAHf° (products) and EAHf° (reactants). 2. The activation energy for the forward reaction is the negative of the activation energy for the reverse reaction. 3. The pre-exponential or frequency factor in the Arrhenius equation is a measure of the fraction of reactant molecules having sufficient energy to react. 4. The activation energy of...
48. If the conversion of A to B is slow and B to C is fast, what is the rate equation for this reaction? A) Rate = K[(CH3CHCI][H20] B) Rate - K[(CH3)2CHCI] C) Rate = K[(CH3)CH] [H0] D) Rate = {[(CH3)2CH] 49. Which of the following statements about a catalyst is true? A) A catalyst accelerates a reaction by changing the amount of reactant and product at equilibrium B) A catalyst accelerates a reaction by lowering the energy of activation...
Given the equilibrium reaction for a general reaction, A+B <->C, explain what happens to the reactants and products from time until the time at which the A reaction reaches equilibrium. (Choose any that are correct) Concentration (mol.dm-3) B С Time (s) Once products are formed in a reversible reaction, reactans can not be formed At equilibrium both the reactant and product concentration are the same At time 0, there are no products. At equilibrium all concentrations become constant As the...
Most reactions occur by a series of steps. The energy profile for a certain reaction that proceeds by a two-step mechanism is shown below. 2 1 Reaction coordinate In regard to the energy profile, identify the following. (a) The positions of reactants and products reaction coordinate for reactants 1 reaction coordinate for products 3 (b) The activation energy for the overall reaction. (Enter your answers in increasing numerical order.) the energy difference between reaction coordinatesSelect and-Select (c) AE for the...
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