AP Chemistry (17) Spontaneity, Entropy, and Free Energy

Spontaneous Reactions

• Occur without outside intervention

• Needs outside intevention to occur

• Always occur in both directions of the equation

• Never happen

Which of the following is NOT spontaneous

• A ball rolls down a hill

• Steel exposed to air and moisture rusts

• Heat flows from a hot object to a cooler one

• Gas collects at one end of a container

Spontaneous Reactions can only be exothermic

• True

• False

The driving force for a spontaneous force is...

• A decrease in entropy in the universe

• An increase in entropy in the universe

• An increase in entropy in the system

• A decrease in entropy in the system

The measure of molecular randomness or disorder is

• Spontaneity

• Entropy

• Enthalpy

• Free Energy

Positional Probability increases when changing from...

• Liquid to Gas

• Solid to Liquid

• Liquid to Solid

• Gas to Liquid

Tags

NGSS.MS-PS1-4

Which has a higher positional probability?

• The reaction is spontaneous in the reverse direction

• The entropy of the universe decreases

• The reaction is always spontaneous in both the reverse and written directions

• The reaction is spontaneous is the direction written

Tags

NGSS.HS-PS3-4

Tags

NGSS.HS-PS3-4