chapter 5- kinetics Flashcards
(7 cards)
1
Q
what is activation energy
A
the minimum energy required for a reaction to occur
2
Q
what type of reaction is a positive energy change
A
endothermic
3
Q
what type of reaction is a negative energy change
A
exothermic
4
Q
what factors affect the rates of a reaction
A
- temperature
- pressure (gas)
- concentration of solution (liquids)
- surface area (solids)
- adding a catalyst
5
Q
what does the Maxwell-Boltzmann distribution show
A
it shows the distribution of the energy amongst the particles in any gas or liquid
6
Q
what happens to the Maxwell-Boltzmann graph when temperature is increased
A
- the peak of the curve is lowered and moves slightly to the right
- the number of particles with very high energy increases
- the total area under the curve is the same for all temperatures
7
Q
why is the total area under the curve the same for each temperature in a Maxwell-Boltzmann distribution graph
A
because it represents the total number of particles
