Catalysts and angular dependence
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Catalysts and angular dependence
Since the catalyst (more specifically an enzyme) is holding the reactant(s) in the proper position for the reacting bonds to be weakened and accessed easier, then does a catalyst also increase the a angular dependence constant (A)?
Re: Catalysts and angular dependence
I think that would make sense but usually, the effect of the catalyst is represented in the Arrhenius equation as a lower Ea value.
Re: Catalysts and angular dependence
While that does make sense, Dr. Lavelle said that it just lowers the value of Ea and the equation, so I am unsure.
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Re: Catalysts and angular dependence
I believe that's the case for most biological catalysts (enzymes) but not for some chemical ones. Catalysts usually modify the reaction mechanism, so while it will always make it easier for a reaction to happen, that does not necessarily mean it lowers angular dependence. It may just render the reactants into a type of intermediate that is easier to break apart, thus allowing more collisions to happen.
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Re: Catalysts and angular dependence
For most chemical catalysts, the compound provides more thermodynamically efficient reactions. Different intermediaries, different (lower) activation energies.
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Re: Catalysts and angular dependence
Hi!
The angular dependence constant (A) is a term used in the Arrhenius equation, which explains the influence of temperature on the rates of chemical reactions. A catalyst has no direct impact on the value of A in the Arrhenius equation, as it does not alter the temperature dependence of the reaction rate.
However, a catalyst can raise the rate constant (k) in the Arrhenius equation by decreasing the activation energy (Ea). This is because the catalyst provides an alternate pathway for the reaction with a lower activation energy, making it easier for the reactants to cross the energy barrier and so enhancing the pace of the reaction.
Hope this helps!
The angular dependence constant (A) is a term used in the Arrhenius equation, which explains the influence of temperature on the rates of chemical reactions. A catalyst has no direct impact on the value of A in the Arrhenius equation, as it does not alter the temperature dependence of the reaction rate.
However, a catalyst can raise the rate constant (k) in the Arrhenius equation by decreasing the activation energy (Ea). This is because the catalyst provides an alternate pathway for the reaction with a lower activation energy, making it easier for the reactants to cross the energy barrier and so enhancing the pace of the reaction.
Hope this helps!
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