the-rate-of-a-reaction-can-be-affected-by-a-the-phase-of-the-reactants-b-the-temperature-of-the-reac

Question

The rate of a reaction can be affected by
(A) The phase of the reactants.
(B) The temperature of the reactants.
(C) The presence of a catalyst.
(D) All of the above.
(E) None of the above.

David Collins · Accepted Answer

The last question in this section is a review of what effects the rate of a reaction. There are five different things, actually. Three different things, and you are asked to choose whether it&#x27;s one of them, all of them or none of them that can affect the rate of the reaction. The first one says the phase of the reactant. This is true because a gas well typically react more quickly than a solid. This is because a gas can mix more readily with the other reactant molecules than a solid can, because a solid that simply has its molecules or its atoms bound to each other. And it&#x27;s difficult to get them to come in contact with other reactant molecules. So, yes, this is true. B says the temperature of the reaction. Yes, we know this is true. As we increase the temperature, we increase the kinetic energy of the molecules. They move more quickly, they collide more readily. Thus, the rated the reaction can increase the presence of a catalyst. Yes, this is also true. The presence of a catalyst will drop the activation energy and increase the rate of the reaction. So the answer then, is D. All of the above

Bin Chen · Answer

Okay, so for a its activation energy and the catalyst actually decreases theatric ation energy of a reaction to make the reaction faster for B, we have reaction mechanism and a catalyst changes. Do you reaction mechanism, the reaction mechanism to an alternate routes. So what I mean by that is let&#x27;s say we have this reaction with a certain amount of activation energy by here, right? So what happens when a catalyst is added is that informs another alternate route with a lower activation energy. Right. So this forms an alternate route right here. Any increases to you? Rate of reaction now for part C, its entropy of reaction. So a catalyst does not affect so catalyst does not effect in therapy of reaction. And then for D and E, it says the rate of forward and reverse step. So it&#x27;s just d must be. So a catalyst increases. Do you rate of both forward and reverse reaction steps. And why is that? Well, if we look appear, we see that the alternate route it would go from this side. It decreases Thea activation energy, which means I increases the reaction rate. But if we were to go from right two left, we see that also decreases the activation energy. This increases. Do you reaction speed

Mariana Roldan · Answer

we were given these four factors. Three out of these four factors well, increase the rate of reaction of a chemical reaction and were asked to name which one does not, would not increase the rate of reaction. So first, let&#x27;s go through all of these. The presence of catalysts Would that increased their vehicle rate of reaction? It would. The Panelists are substances that will help accelerate a reaction by participating in the reaction without being consumed. So catalysts provide an alternative alternate reaction pathway two obtained products and there, um, help speed up the reaction. So next we have increasing temperature. Would that help speed up the reaction? Yes, it would, though an increase in temperature will increase the average kinetic energy of the reactive molecules. Um, this results in a greater proportion of molecules that will have the minimum energy necessary for an effective collision. So would increasing the particle size increase the rate of reaction it would not. This does not have an effect on increasing the rate of reaction. So in this case, this would be our answer for this question now. But let&#x27;s talk about De De says, increasing the concentration of react IDs with increasing the concentration of reactant, accelerate the reaction rate and yes, it would. This is because ah, higher concentration of a reactive would lead to more collisions of that reacted so higher concentration is more collisions in a specific time period. Therefore, your reaction rate is faster.

Kyle Angle · Answer

here we are asked to think about a reaction that occurs in the gas phase and his XO thermic for these five different conditions. How is the equilibrium constant? K impacted first, removing a reactor Well, we know from Lee Shot liaise principle that removing a reactant shifts the equilibrium of assistant itself. The equilibrium, constant itself K remains unchanged. That&#x27;s because it&#x27;s an equilibrium constant, and so it doesn&#x27;t actually depend on the conditions you apply to it at a given time in terms of concentrations or, in this case, partial pressures of the gases in your system. Likewise, removing a product would invoke a leash Appy ace principle, but you still would see no change in K as it is an equilibrium constant. Similarly, if you decrease the volume of your system, we know that that would shift equilibrium towards the side that has fewer moles of gas. And so, while this might impact the exact composition of the system that you see the equilibrium, constant itself will not change. This is because equilibrium constance are only temperature dependent, not pressure, dependence. But they are temperature dependent. So now we have to think when we get to decreasing the temperature. We&#x27;re told that the reaction is XO thermic. When we hear XO thermic, we can think of heat as a product if we add more heat than we&#x27;re inhibiting this reaction from going forward, and so the reaction will actually shift back towards the starting materials. Therefore, the reaction constant K will decrease. Finally adding a catalyst and in a catalyst tends to speed things up. But ultimately there is no change in K since it&#x27;s just a description of the ratios at equilibrium.

Will Li · Answer

so for a specific reaction are rate constant. So we can say that if we have a plus B becomes see, our rain is always gonna be que times the conservation A and being we&#x27;ll just pretend that is the first order reaction in respect to each of these, uh, reactions. And so, ah, the value of our rate constant is going to be unique to this reaction for a specific temperature. So really, the only thing you can do to change the value of K first desert reaction is change the temperature. So that means our answer is therefore gonna be see?

David Collins · Answer

The purpose of a catalyst in a chemical reaction is to provide an alternate path. Or we often call this a mechanism with a lower activation energy in order to increase the rate of the reaction. Because of the lower activation energy, a catalyst is not consumed during the reaction. So answer a catalysts are used up is incorrect. Catalyst. Increase the rate of the reaction by lower in the act. The activation energy. That&#x27;s point B. That is correct. Catalyst. Alter the thermodynamics. This is not necessarily true. They just affect the, um, activation energy. And then Catalyst stabilized the transition state. They have nothing to do with the transition state. All they do is lower the activation energy by providing an alternate path, um, to increase the rate of the reaction.

Problem 11 Easy Difficulty

The rate of a reaction can be affected by
(A) The phase of the reactants.
(B) The temperature of the reactants.
(C) The presence of a catalyst.
(D) All of the above.
(E) None of the above.

Answer

The rate of a reaction can be affected by $\Rightarrow$
(A) The phase of the reactants.
(B) The temperature of the reactants.
(C) The presence of a catalyst.
(D) no answer available
(E) no answer available

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The rate of a reaction can be affected by $\Rightarrow$(A) The phase of the reactants.(B) The temperature of the reactants.(C) The presence of a catalyst.(D) no answer available(E) no answer available

Living by Chemistry

Theodore D.

Stephanie C.

Allea C.

Karli S.

Liquids - Intro

Comparison Of Gases Liquids And Solids

Angelica M. StacyLiving by Chemistry

Theodore D.

Stephanie C.

Allea C.

Karli S.

The rate of a reaction can be affected by $\Rightarrow$
(A) The phase of the reactants.
(B) The temperature of the reactants.
(C) The presence of a catalyst.
(D) no answer available
(E) no answer available

Angelica M. Stacy

Living by Chemistry