# Notes taken during lecture

LECTURE 8: Kinetics and Equilibrium

Slide No. Notes

KINETICS

31 -lower to higher temperature, energy of collisions increases

-for a reaction to occur, there must be a collision and the collision

must have sufficient energy

35 -increasing temperature, the smaller the exponent, therefore the

larger the k

-to use the equation, either get data from two different temperature

points to determine activation energy or graphically

37 - Ea = -Rin(k2/k1) all over (1/T2 – 1/T1) = -8.314J/molK times

In(1.10x10^-5L/mols divided by 9.51x10^-9L/mols) all over (1/600K –

1/500K) = 1.76 kJ/mol

38 -valley – intermediates

-peaks – steps of the reaction

-a reaction is faster because the activation energy is smaller

-the energy difference between reactants and products remains

unchanged with a catalyst

-catalyst is at the beginning and end

-intermediate only at the middle, used up, not remade

40 - how a catalytic converter works

41 -when pressure and temperature cannot be readily controlled, a

enzyme allows reactions to occur under relatively mild conditions

-do not need to know mechanism

42 -Ans1: B – compare 1 and 2 – double red, double rate – first order

-Ans2: A – compare 1 and 3 – double blue, no change in rate – 0th

order

-Ans3: B – any concentration that affects rate of reaction does not

have to be in final equation

-Compare 1 and 4

-Therefore rate = k[A][C]

EQUILIB.

2-making reactants at same rate as products

-past the dotted vertical line, chemical equilibrium achieved – same

rate

3- once at equilibrium, colour will not change because relative concentrations

will not change

5- Ans:C

6-note exponent 2 – from coefficient of NO2

-because of Arrhenius equation

7-no units

-Ans: A

8-RT to the power of (c+d-a-b) is basically RT to the power of delta n

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## Document Summary

Ea = -rin(k2/k1) all over (1/t2 1/t1) = -8. 314j/molk times. In(1. 10x10^-5l/mols divided by 9. 51x10^-9l/mols) all over (1/600k . When pressure and temperature cannot be readily controlled, a enzyme allows reactions to occur under relatively mild conditions do not need to know mechanism. Ans1: b compare 1 and 2 double red, double rate first order. Ans2: a compare 1 and 3 double blue, no change in rate 0th order. Ans3: b any concentration that affects rate of reaction does not have to be in final equation. Making reactants at same rate as products past the dotted vertical line, chemical equilibrium achieved same rate. Once at equilibrium, colour will not change because relative concentrations will not change. Ans:c note exponent 2 from coefficient of no2 because of arrhenius equation no units. Rt to the power of (c+d-a-b) is basically rt to the power of delta n www. notesolution. com. Concentration depend on amount of co2, not any of the solids.