Kinetics
Kinetics Pt 2
Vectors
Kinematics
100
What’s activation energy?
minimum Ek needed as particles collide before they can rearrange in structure
100
What’s bond energy?
The amount of energy required to break a bond between two atoms
100
Starting from Mr. Shim's classroom, Alan runs 10 laps around Palmer, then he goes back into Mr. Shim's classroom. What is his displacement?
0m
100
what is acceleration?
change in velocity/change in time
200
RATE depends on which 2 things?
frequency of collisions
fraction of those collisions that are effective
200
What is the formula of the rate law (use X and Y as concentrations, and m and n as orders)
Rate = k[X]m [Y]n
200
Arnav travels 102m west, 67m south, 69m east. What is the distance he travelled?
238m
200
Marvin starts from rest, accelerates to 10m/s over 5s. What is his acceleration?
2m/s2
300
Name 5 factors affecting reaction rate
nature of reactants — ie. strength of bonds, chemical properties
concentration — [ ] ↑ Rate ↑
surface area — only HETEROGENOUS reactions
pressure — REACTANT PRESSURE ↑ Rate ↑
temperature — TEMP ↑ Rate ↑
*catalysts — Rate ↑
300
What does the potential energy graph of an exothermic reaction look like? (label the activation energy and ΔH)
300
Arnav travels 5m west, 2m south, 3m east. What is his displacement?
2.83 m, 45° south of west
300
What are the 4 important high school kinematics formulas? (i.e. the ones on the physics 12 formula sheet)
Vf=Vi+at
d=Vit+1/2at2
Vf2=Vi2+2ad
v =Vi+Vf/2
400
The concentration of NO decreases from 0.080 mol/L to 0.056 mol/L over a period of 25 seconds. Calculate the reaction rate in terms of the disappearance of NO.
Reaction: 2NO(g)+O2(g) --> 2NO2(g)
9.6x10-4M
400
What is the net reaction?
(CH3)3CBR --> (CH3)3C++ Br-
(CH3)3C+ + H2O --> (CH3)3COH2+
(CH3)3COH2+ --> (CH3)3COH + H+
(CH3)3CBR + H2O --> (CH3)3COH + Br- + H+
400
Two forces, 30 N east and 40 N north, act on an object. Find the net force.
50 N, 53° north of east
400
A dolphin accelerates from 1.0 m/s to 7.6 m/s in 5.5 seconds. Find the distance travelled
24 m
500
What is the net reaction of the following:
HBr + O2 → HOOBr
HOOBr + HBr → 2HOBr
2HOBr + 2 HBr → 2 H2O + 2Br2
4HBr + O2 → 2H2O + 2Br2
500
Overall rxn: 2NO + 2H2 --> 2H2O + N2
Step 1: NO+H2 --> N + H2O
Step 2: ?
Step 3: N2O + H2 --> N2 + H2O
NO+N --> N2O
500
A person walks 10 m at 30° north of east, then 15 m due east. Find the resultant displacement.
24.1 m, 12° north of east
500
An object is initially moving at 6.0 m/s due East. It accelerates due South at 3.0 m/s2 for 4 seconds. Find its final velocity.
13.4 m/s 63.4°S of E