Factors Affecting k


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Sarah Zhari 1D
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Factors Affecting k

Postby Sarah Zhari 1D » Thu Mar 12, 2020 12:17 pm

Can the rate constant (k) of a reaction change? If so, how?

Vinita Saxena 2I
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Re: Factors Affecting k

Postby Vinita Saxena 2I » Thu Mar 12, 2020 12:18 pm

Yes, it can change if the temperature changes, that is the only way it can change

Selena Yu 1H
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Re: Factors Affecting k

Postby Selena Yu 1H » Thu Mar 12, 2020 12:18 pm

Yes, the rate constant can change. It can change due to temperature. The rate constant is related to temperature through the Arrhenius equation.

Daniel Toscano 1L
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Re: Factors Affecting k

Postby Daniel Toscano 1L » Thu Mar 12, 2020 12:20 pm

k = A exp( -EA/RT )
this shows how it can be changed

Cindy Adiwidjaja 1B
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Re: Factors Affecting k

Postby Cindy Adiwidjaja 1B » Thu Mar 12, 2020 12:21 pm

It can only change with temperatures.

Myka G 1l
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Re: Factors Affecting k

Postby Myka G 1l » Thu Mar 12, 2020 12:43 pm

The rate constant k is similar to the equilibrium constant K in that it is only affected by a change in temperature.

Tanmay Singhal 1H
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Re: Factors Affecting k

Postby Tanmay Singhal 1H » Thu Mar 12, 2020 12:45 pm

temperature is the only way to change k

Celine 1F
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Re: Factors Affecting k

Postby Celine 1F » Thu Mar 12, 2020 2:05 pm

rate constant can change due to temperature changes

ShravanPatel2B
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Re: Factors Affecting k

Postby ShravanPatel2B » Thu Mar 12, 2020 2:11 pm

Temperature can have an affect on the value of the equilibrium constant. This problem was also on the midterm i believe.

Jacob Motawakel
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Re: Factors Affecting k

Postby Jacob Motawakel » Thu Mar 12, 2020 2:12 pm

yes k can change, but only due to temperature.

Michelle Xie 2B
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Re: Factors Affecting k

Postby Michelle Xie 2B » Fri Mar 13, 2020 5:30 pm

it changes with temperature.

Leila_4G
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Re: Factors Affecting k

Postby Leila_4G » Sat Mar 14, 2020 1:21 pm

Also, k is a intensive property, not an extensive property, right?

Matthew Tsai 2H
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Re: Factors Affecting k

Postby Matthew Tsai 2H » Sat Mar 14, 2020 7:32 pm

Generally, k increases with temperature.

Chris Charton 1B
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Re: Factors Affecting k

Postby Chris Charton 1B » Sat Mar 14, 2020 9:45 pm

I believe we only go over temperature changing rate, however it can be changed by altering activation energy as well(adding or removing a catalyst)

It is related in the Arrhenius equation; k=Ae^(-Ea/RT)

I think we have to understand the concept of catalysts, but not necessarily how to compute an equation with them.

SMIYAZAKI_1B
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Re: Factors Affecting k

Postby SMIYAZAKI_1B » Sat Mar 14, 2020 9:51 pm

The rate constant of the equation can alter in two ways: Changing temperature and addition of the catalyst. This can be considered as mixing salt into the water. If you add heat into the water, the molecules will vibrate even more which causes it to dissolve even more, and if you add some sort of proteins, it would be helpful to decrease the activation energy which means that because you don't need that much energy per reaction process, you can easily allow the equation to take place.

905373636
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Re: Factors Affecting k

Postby 905373636 » Sat Mar 14, 2020 10:01 pm

Vinita Saxena 2I wrote:Yes, it can change if the temperature changes, that is the only way it can change


Isn't the addition of a catalyst also a way to change it?

Alfred Barrion 2H
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Re: Factors Affecting k

Postby Alfred Barrion 2H » Sat Mar 14, 2020 10:02 pm

k can only change when there is a temperature change.


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