General Chemistry 2.1

Entropy is a measure of

• accuracy

• precision

• the disorder of a system

• the attraction of a nucleus for an electron

What phase of matter has the most entropy?

• solid

• liquid

• gas

• all of the above

What is a spontaneous process ?

• slow process

• fast process

• process that needs an external intervention to occur

• process that does not need external intervention to occur / keep happening

Reactions which do not produce the written products under the given conditions.

• spontaneous

• nonspontaneous

Spontaneous reactions may be extremely slow.

• True

• False

Nonspontaneous reactions may be extremely fast under the specified conditions.

• True

• False

Two factors that determine the spontaneity of a reaction are:

• entropy and free energy

• enthalpy and free energy

• entropy and enthalpy

• endothermic and exothermic

The entropy will usually increase when

• a molecule is broken into two or more smaller molecules

• a reaction occurs that results in an increase in the number of moles of gas

• a solid changes to a liquid

• all of these

Ammonium nitrate dissolves in water. It is a spontaneous endothermic process because the system undergoes....

• a decrease in enthalpy

• an increase in entropy

• an increase in enthalpy

• a decrease in entropy

Systems in nature tend to undergo changes toward

• lower energy and less disorder

• lower energy and more disorder

• higher energy and less disorder

• higher energy and more disorder