Which of the following does NOT change the energy of the reactants relative to the activation energy?

A. increasing the temperature

B. increasing the surface area

C. adding a catalyst

D. reducing the temperature

***not sure on this one :(

what do you think @.Sam. @abb0t :)

i feel like it has something to do with the temperatures, but then again, temp always changes the energy right? :/

Question

Which of the following does NOT change the energy of the reactants relative to the activation energy?

A.       increasing the temperature

B.       increasing the surface area

C.       adding a catalyst

D.       reducing the temperature

***not sure on this one :(

what do you think @.Sam. @abb0t :) 

i feel like it has something to do with the temperatures, but then again, temp always changes the energy right? :/

anonymous · Answer

okay... so one of the temperatures doesn't change anything then? :O

anonymous · Answer

im not sure from there though :( 

im a bit confused on this :/

anonymous · Answer

how do i figure out which one it is? :/

abb0t · Answer

My guess is "D" because a decrease in temp (energy) would not change the energy of the reactants. Don't quote me on this though. I'd have to check my notes. If you can wait, i' can double check later, not right now though :p

anonymous · Answer

hahaa okay :P

thanks! :) im gonna post another one right now though, so ima close this, but when you double check later, can you please let me know? so i can remember? :) finals are coming up! and i can't seem to remember all the info! lol :( I'm using these to study :) so I'm hoping i do well on my final!!! :) hehe :P

abb0t · Answer

energy of activation is defined as $\LARGE k = Ae^{\frac{E_a}{RT}}$
which means that it IS dependent on tempertaure.

anonymous · Answer

and don't worry :P I won't quote you on this :P

anonymous · Answer

wait so would the answer still be either A or D then? cuz the temp would be what is changing or NOT changing the energy of activation right?

abb0t · Answer

Wait, NO. yeah, answer is C.

anonymous · Answer

wait, I thoguth it was C earlier but i may be wrong also

abb0t · Answer

No, C is correct. Sorry
as I saw the Arrhenius equation, I' see it's dependent on temp.

abb0t · Answer

|dw:1370115349582:dw|

anonymous · Answer

haha ohh okay i see... so basically since its dependent on temp, either way, increasing or decreasing, it will definitely affect the energy of activation?

abb0t · Answer

the reactant and product energies remain the same as you can see. Only thing that changes it ehe enrgy of activation.

anonymous · Answer

ahh okay i see :) thank you so much! :)