Review Kinetics and Review Kinetics and Equilibrium TestEquilibrium Test

Which will occur if a catalyst is Which will occur if a catalyst is added to a rxn mixture?added to a rxn mixture?

1.1. Only the rate of the reverse Only the rate of the reverse reaction will increasereaction will increase

2.2. Only the rate of the forward Only the rate of the forward reaction will increasereaction will increase

3.3. The energy change of the rxn (The energy change of the rxn (ΔΔH) H) will be decreasedwill be decreased

4.4. The activation energy will be The activation energy will be changedchanged

Draw a PE vs. Rxn mechanism Draw a PE vs. Rxn mechanism graph that shows an exothermic graph that shows an exothermic

reactionreaction

Label the:Label the:

PEPEreactantsreactants

PEPEproductsproducts

Activated complexActivated complex ΔΔHH

According to Reference Table IAccording to Reference Table Ithe greatest amount of energy the greatest amount of energy

would be given up by the complete would be given up by the complete oxidation of 1 mole of:oxidation of 1 mole of:

1.1. CC66HH1212OO6 6 (s)(s)

2.2. CC33HH88 (g) (g)

3.3. CHCH33OH (l)OH (l)

4.4. CHCH44 (g) (g)

In a chemical rxn, the difference b/t In a chemical rxn, the difference b/t the PE of the products and the PE the PE of the products and the PE

of the reactants is called what?of the reactants is called what?ΔH

Given the below rxn, which choice Given the below rxn, which choice will cause less CHwill cause less CH33COOCOO--

1.1. NaNa++

2.2. HH33OO++

3.3. OHOH--

4.4. ClCl--

CHCH33COOH + HCOOH + H22O O H H33OO++ + CH + CH33COOCOO--

Which equilibrium constant Which equilibrium constant indicates an equilibrium mixture indicates an equilibrium mixture

that favors the formation of that favors the formation of products?products?

1.1. KKeqeq= 1 x 10= 1 x 10-5-5

2.2. KKeqeq= 1 x 10= 1 x 10-1-1

3.3. KKeqeq= 1 x 10= 1 x 1055

4.4. KKeqeq= 1 x 10= 1 x 1000

What is the equilibrium expression What is the equilibrium expression for the rxn:for the rxn:

4Al (s) + 3O4Al (s) + 3O22(g) (g) 2Al 2Al22OO3 3 (s)(s)

What is the correct equilibrium What is the correct equilibrium expression for:expression for:

2CO (g) + O2CO (g) + O22 (g) (g) 2CO 2CO22

The heat of reaction is defined as The heat of reaction is defined as what?what?

Heat content of products – Heat

content of reactants

At temperatures above 0At temperatures above 0ooC which C which phase change occurs?phase change occurs?

1.1. HH22O(s) O(s) H H22O(l), endothermic and O(l), endothermic and spontaneousspontaneous

2.2. HH22O(s) O(s) H H22O(l), exothermic and O(l), exothermic and spontaneousspontaneous

3.3. HH22O(l) O(l) H H22O(s), endothermic and O(s), endothermic and spontaneousspontaneous

4.4. HH22O(l) O(l) H H22O(s), exothermic and O(s), exothermic and spontaneousspontaneous

A 1-g sample of a substance has A 1-g sample of a substance has the greatest entropy when it is in the greatest entropy when it is in

the :the :

1.1. Crystalline stateCrystalline state

2.2. Liquid stateLiquid state

3.3. Gaseous stateGaseous state

4.4. Solid stateSolid state

The molecules of which The molecules of which substance have the substance have the

highest average kinetic highest average kinetic energy?energy?A.A.COCO2 (g)2 (g) at 20 at 20oo

B.B. HCl HCl (g)(g) at 40 at 40oo

C.C.NN2(g)2(g) at 60 at 60oo

D.D.HeHe(g)(g) at 0 at 0oo

If the forward activation of If the forward activation of the rxn below is 20 kcal, the rxn below is 20 kcal, what is the activation of what is the activation of

the reverse reaction?the reverse reaction?

AA(g)(g) + B + B(g)(g) C C(g)(g)+D+D(g)(g)+ 30 + 30 kcalkcal

In a gaseous system, Temp In a gaseous system, Temp remaining constant, an increase in remaining constant, an increase in

pressure willpressure will

1.1. Increase the activation energyIncrease the activation energy

2.2. Decrease the activation energyDecrease the activation energy

3.3. Decrease the reaction rateDecrease the reaction rate

4.4. Increase the reaction rateIncrease the reaction rate

As the surface area of the Zinc As the surface area of the Zinc used in the reaction increases, the used in the reaction increases, the

rate of reaction will . . .rate of reaction will . . .

ZnZn(s) (s) + 2HCl+ 2HCl(aq)(aq) ZnCl ZnCl2(aq)2(aq) + H + H2(g)2(g)

At 10At 10ooC, 23-g of a substance C, 23-g of a substance saturates 100-g of water. What is saturates 100-g of water. What is

the substance?the substance?

What is the maximum number of What is the maximum number of grams of NHgrams of NH44Cl that will dissolve in Cl that will dissolve in

200-g of water at 70200-g of water at 70ooCC

What is the solubility product What is the solubility product constant expression (Kconstant expression (Kspsp) for the ) for the

reaction belowreaction below

AgAg22SS(s)(s) = 2Ag = 2Ag++(aq)(aq) + S + S-2-2

(aq)(aq)

You now can review at homeYou now can review at home

If you know the special tricksIf you know the special tricks If you have the druthersIf you have the druthers