AP Chemistry Spontaneity Entropy and Free Energy

Delta G is negative indicates

• reaction is exothermic

• reaction is endothermic

• reaction is spontaneous

• reaction is not spontaneous

A phase change from solid --> liquid

• shows a decrease in entropy

• shows an increase in entropy

• is exothermic

• is endothermic

Which of these would ALWAYS indicate a process is spontaneous?

Delta S is negative indicates

• enthalpy increases

• enthalpy decreases

• entropy decreases

• entropy increases

Which tendencies favor a spontaneous reaction?

• decreasing enthalpy and decreasing entropy

• increasing enthalpy and increasing entropy

• increasing enthalpy, and decreasing entropy

• decreasing enthalpy and increasing entropy

Entropy is a measure of

• accuracy

• precision

• the disorder of a system

• the attraction of a nucleus for an electron

Tags

NGSS.HS-PS3-4

Entropy always increases when

• enthalpy decreases.

• temperature decreases.

• temperature increases.

• volume increases.

Tags

NGSS.HS-PS3-4

Which of the following quantities decreases in every spontaneous reaction?

• usable energy

• temperature

• entropy of the system

• volume

Heat has the highest amount of entropy

• T

• F

Tags

NGSS.HS-PS3-4

A phase change from gas --> liquid

• shows a decrease in entropy

• shows an increase in entropy

• is exothermic

• is endothermic

Tags

NGSS.HS-PS3-2