KINETICS AND THERMODYNAMICS

Question 1

The speed with which reactants are converted into products

Answer 1

Reaction Rate

Question 2

the minimum amount of energy the colliding reactant particles must have in order for products to form OR the minimum amount of energy required to initiate a reaction

Answer 2

Activation energy

Question 3

the science of the relationship between heat and other forms of energy

Answer 3

Thermodynamics

Question 4

The study of the quantity of heat absorbed or evolved by chemical reactions

Answer 4

Thermochemistry

Question 5

defined as the energy that flows into or out of a system because of a difference in temperature between the system and its surroundings (symbol is q)

Answer 5

Heat

Question 6

a reaction that evolves heat into surroundings (out)

Answer 6

Exothermic reaction

Question 7

A reaction that absorbs heat from surroundings (in)

Answer 7

Endothermic reaction

Question 8

an extensive property of a substance that can be used to obtain the heat absorbed or evolved in a chemical reaction (symbol is H)

Answer 8

Enthalpy

Question 9

states that the enthalpy of a reaction is equal to the total formation energy of the products minus that of the reactants

Answer 9

Law of summation of heats of formation

Question 10

states that for a chemical equation that can be written as the sum of two or more steps, the enthalpy change for the overall equation is the sum of the enthalpy changes for the individual steps

Answer 10

Hess’ Law of Heat Summation

Question 11

the chemical equation for a reaction (including phase labels) in which the equation is given a molar interpretation, and the enthalpy of reaction for these molar amounts is written directly after the equation

Answer 11

A Thermochemical equation

Question 12

a substance that alters the rate of a chemical reaction without being used up or permanently changed chemically OR a substance that lowers the activation energy

Answer 12

Catalyst