1.5 kinetics Flashcards
(8 cards)
1
Q
whats activation energy
A
min energy required to start a reaction
2
Q
how catalyst works
A
- decrease activation energy
- provide alternative pathway
3
Q
whats rate of reaction
A
change in conc per sec
OR
amount of substance formed/reacted per sec
4
Q
whats does a graph mean when the line starts to level up
A
- rate is zero
- reactant all reacted/ used up
- reaction completed/ stopped
- no more collision
- no more product produced
5
Q
how ↑ temp affect rate
A
- more KE = move quicker
= more frequent successful collision per sec - ↑ proportion of particles will have energy more than activation energy = ↑ successful collision per sec
6
Q
how ↑↓ conc/ pressure affect rate
A
- ↑/↓ particles in same vol
- closer tgt/ futher apart
- ↑/↓ frequent collision per sec
7
Q
maxwell boltzmann distribution
A
- must start (0,0) - no molecule can have 0 energy
- peak = most probable
- mean - R to peak
- area under graph = no. of particles
- doesnt meet x-axis (no upper limit)
8
Q
↑ temp, conc/ pressure, catalyst changes maxwell boltzmann distribution
A
temp - ↓ peak (particles more spread out) + shit R
conc/pressure - ↑ peak
catalyst - catalyst line shift L
