who did the 2013 new format official practice test? I think it was much harder than any other practice tests I’ve taken.
@taw1020 Okay, now you confused me. We agree that pressure would change A right? But, A affects k in the Arrhenius equation.
But i thought there were only 50 questions on the 2014 practice test @batmen
oh wait I don’t think my teacher gave us the full test :((
Agh I keep messing everything up, it’s definitely multiplication (K, not delta H), sorry. And thanks, @Frigidcold 
As opposed to pencil? No, you can use pencil.
Does the addition of a catalyst affect enthalpy or entropy?
sorry i meant A as in an example reactant in a reacton. Not the activation energy.
I changed it to something else.
^Thought it didn’t affect either, but my brain has apparently stopped functioning…
it does affect enthalpy because it requires less energy to reach the activation point
my head is about to explode atm, we really need to quit
oh guys also remember that Ksp is only [A]^a[ B ]^b (the products)
@dsi411 @Mathman97
No, it doesn’t. If you look at a heating curve with the addition of a catalyst, the starting and ending values are the same, which means delta h is the same.
Anyone know the Kp to Kc conversion? NVM FOUND IT
ooops thats right^ the values are the same, catalyst just gets there quicker
@SippinCoffee There are only 50 questions on the practice exam. I was just factoring in my FRQ scores to get a percentage of total points, which is what the curve is based on.
I think someone in this topic said that there are 60 questions on the actual exam though, just that 10 of them are experimental.
@Frigidcold - Kp = Kc(RT)^delta(n)
Ya, 10 are experimental
@dsi411 no effect on either I believe
kc=kp/(rt)^N
Ksp = only products. Rate = k([reactants]. Keq = products/reactants @SippinCoffee
Can anyone think of any other potentially confusing things?
delta H values are added in Hess’s Law; Kp/Ka/etc values are multiplied?