Chemical Kinetics and Equilibrium

Question 1

Are stoichiometric coefficients the same as reaction order?

Answer 1

No, the orders of reaction are related to the rates of the reaction which do not necessarily depend on the stoichiometric ratios

Question 2

What is the only factor that can change the rate of a zero order reaction?

Answer 2

Temperature

Question 3

How can you use enthalpy change to determine if a reaction is exothermic?

Answer 3

Negative enthalpy change indicates that heat is give off

Question 4

How do you calculate the change in enthalpy?

Answer 4

By subtracting the initial potential energy of the reactants from the final potential energy of the products

Question 5

What factors increase reaction rate?

Answer 5

Greater reactant concentration
Higher temperatures
State or type of medium (dependent upon reaction)
Presence of a catalyst

Question 6

What are the properties of the equilibrium constant?

Answer 6

Pure solids and liquids do not appear in the equilibrium expression
Characteristic of a given temperature
If K(eq) >>> 1, very little reactants in equilibrium mixture
If K(eq) <<< 1, very little products in equilibrium mixture
If K(eq) = 1, approximately equal amounts