Exam 1 Flashcards
1
Q
ΔGrxn?
A
ΔGrxn= nG(products) - nG(reactants) or ΔGrxn=ΔHrxn -TΔSrxn or ΔGrxn= -TΔSuniv
2
Q
ΔHrxn?
A
ΔHrxn= nH(products) - nH(reactants)
3
Q
ΔSrxn?
A
ΔSrxn= nS(products) - nS(reactants)
4
Q
ΔSsys?
A
ΔSrxn
5
Q
ΔSsurr?
A
-ΔHrxn/T
6
Q
ΔSuniverse?
A
ΔSsys + ΔSsurr
7
Q
How to calculate kelvin?
A
273.15 + ºC
8
Q
Temperature when switches from spontaneous to non-spontaneous?
A
T= ΔHrxn/ΔSrxn
if T < 0, then always spontaneous
9
Q
Arrhenius equation?
A
k= Ae^(-Ea/RT)
or
lnk= (-Ea/RT) + lnA
10
Q
What is A in the Arrhenius equation?
A
The frequency factor
11
Q
What does entropy measure?
A
Disorder, more order, less entropy
12
Q
When is a rxn spontaneous?
A
When ΔGrxn < 0
or
When ΔSuniv > 0
13
Q
Formula of rate law?
A
Rate=k[A]^x[B]^y
14
Q
What to do when calculating a fraction after a time?
A
A ratio of after the time over initial time
15
Q
How to increase rate?
A
Increase temp./ conc./ catalyst, SA
