1- Chapter 14 - Temperature Flashcards
1
Q
Average Molecular kinetic energy?
A
kT
2
Q
Photon Energy=
A
hf
3
Q
What range of energyies do reactions happen and why
A
- 15-30kT = energy needed
- as kT was average energy and very few molecules need the erergy for a resonable rate.
(E/kT is between 15 and 30)
4
Q
n/n0=
(n is number with energy more, n0 is total)
(number of particles in states different by energy E)
A
e-E/kT
5
Q
Pressure difference in a fluid =
A
hρg
6
Q
Whats the origin of the boltzman factor?
A
the progressivly smaller probability of repeativly gaining extra energy from other particles.
7
Q
What is activation energy?
A
The energy needed by to break bonds in a substance before a reaction can take place.
8
Q
What is the boltzman factor?
A
e-E/kT
Proportional to rate of reaction
9
Q
WHat happens when E>>kT
A
Temperature is low, but a change in temperature will gratly increase the boltzman factor.
