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What factor affects the rate of a chemical reaction? collision frequency orientation of molecules fraction of...
Which of the following is not a factor involved in determining the rate of a chemical...
Which of the following is not a factor involved in determining the rate of a chemical reaction? the fraction of collisions which occur with a favorable orientation the total number of collisions per unit time the fraction of collisions with energy greater than the activation energy the molar mass of the reactants
.In general, the rate of a chemical reaction depends on: a. The temperature b. Collision orientation...
.In general, the rate of a chemical reaction depends on: a. The temperature b. Collision orientation c. Activation energy d. All of the above
In the Arrhenius equation, the value for A, the pre-exponential factor, depends on
In the Arrhenius equation, the value for A, the pre-exponential factor, depends on a) the activation energy (the minimum energy needed to convert reactants into products) b) the collision frequency (number of collisions per unit volume and unit time) c) the orientation factor (the fraction of collisions that have an orientation favorable for reaction to occur d) Both b and c e) Both a and b and c
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.
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...
Thank you everymuch I will rate quickly when answered! Chemical reactions occur when molecules or atoms...
Thank you everymuch I will rate quickly when answered!
Chemical reactions occur when molecules or atoms collide, the bonds between atoms are broken, and new bonds are formed. Breaking the bonds of the reactants requires energy; bond formation releases energy Which of the following statements regarding energy changes during a reaction are true? The energy of a collision between atoms or molecules must be greater than or equal to the activation energy (Ea) for bonds to be broken. When the...
Effect of a Catalyst on Reaction Rate: with a lower Ea than for the uncatalyzed reaction....
Effect of a Catalyst on Reaction Rate: with a lower Ea than for the uncatalyzed reaction. This is shown as the blue path with Ea in the diagram below t a given temperature, a catalyst increases the rate of a reaction by providing a pathway E (RJ) products Reaction Coordinale Since the potential energy barrier is lower in the presence of a catalyst, a greater fraction of the molecules will have sufficient energy to react. Because the reactants and products...
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...
According to collision theory, which condition(s) must be met in order for molecules to react? The...
According to collision theory, which condition(s) must be met in order for molecules to react? The reacting molecules must collide with sufficient energy to initiate the process of breaking and forming bonds. 2. A catalyst must be in contact with the reacting molecules for a reaction to occur. The reacting molecules must collide with an orientation that can lead to rearrangement of the atoms.
Dr. Megehee Which statement is false concerning collision theory and reaction rates? A) In most reactions,...
Dr. Megehee Which statement is false concerning collision theory and reaction rates? A) In most reactions, when reactants collide they must be in B) The the proper orientation. rate of a reaction is directly proportional to the number of effective collisions Generally, reaction rates increase by a factor of 10 for each 10 degree increase in Usually, reactions having a low Ea occur faster than ones having a high Ea- Not all collisions are effective.
Which of the following is not a factor involved in determining the rate of a chemical reaction? the fraction of collisions which occur with a favorable orientation the total number of collisions per unit time the fraction of collisions with energy greater than the activation energy the molar mass of the reactants
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...
Thank you everymuch I will rate quickly when answered!
Chemical reactions occur when molecules or atoms collide, the bonds between atoms are broken, and new bonds are formed. Breaking the bonds of the reactants requires energy; bond formation releases energy Which of the following statements regarding energy changes during a reaction are true? The energy of a collision between atoms or molecules must be greater than or equal to the activation energy (Ea) for bonds to be broken. When the...
Effect of a Catalyst on Reaction Rate: with a lower Ea than for the uncatalyzed reaction. This is shown as the blue path with Ea in the diagram below t a given temperature, a catalyst increases the rate of a reaction by providing a pathway E (RJ) products Reaction Coordinale Since the potential energy barrier is lower in the presence of a catalyst, a greater fraction of the molecules will have sufficient energy to react. Because the reactants and products...
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...
According to collision theory, which condition(s) must be met in order for molecules to react? The reacting molecules must collide with sufficient energy to initiate the process of breaking and forming bonds. 2. A catalyst must be in contact with the reacting molecules for a reaction to occur. The reacting molecules must collide with an orientation that can lead to rearrangement of the atoms.
Dr. Megehee Which statement is false concerning collision theory and reaction rates? A) In most reactions, when reactants collide they must be in B) The the proper orientation. rate of a reaction is directly proportional to the number of effective collisions Generally, reaction rates increase by a factor of 10 for each 10 degree increase in Usually, reactions having a low Ea occur faster than ones having a high Ea- Not all collisions are effective.
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