5.2 Entropy

The following statements are true for entropy EXCEPT

• entropy is the measure of molecular disorder

• entropy is greater if matter is more dispersed

• gases have more entropy than liquids of the same substance and temperature

• lowering the temperature causes entropy to increase.

Tags

NGSS.HS-PS3-4

Entropy increases from solid, liquid to gas. Why?

• Molecular disorder increases
• Molecular randomness decreases
• Molecules are more energetic
• Molecules are more reactive

Tags

NGSS.MS-PS1-4

Which statement is TRUE about entropy for a spontaneous reaction?

• ΔS_uni is always decreasing
• ΔS_uni = +ve
• ΔS_uni = -ve
• ΔS_uni = 0

Tags

NGSS.HS-PS3-4

Standard molar entropy is shown below. The following statements are true EXCEPT

• Entropy for solid is lowest
• Entropy for gas is highest
• Increase in entropy from solid to gas
• Increase in orderliness from solid to gas

Predict the entropy change and its spontaniety

• ΔS = +ve and non spontaneous
• ΔS = -ve and spontaneous
• ΔS = -ve and non spontaneous
• ΔS = +ve and spontaneous

Predict the entropy change and its spontaniety

• ΔS = +ve and non spontaneous
• ΔS = -ve and spontaneous
• ΔS = -ve and non spontaneous
• ΔS = +ve and spontaneous

Predict the entropy change and its spontaniety

• ΔS = +ve and non spontaneous
• ΔS = -ve and spontaneous
• ΔS = -ve and non spontaneous
• ΔS = +ve and spontaneous

Predict the entropy change, ΔS.

• ΔS = +ve
• ΔS = -ve
• ΔS = 0
• ΔS = no change

Tags

NGSS.HS-PS1-5

NGSS.HS-PS3-4

Predict the entropy change, ΔS.

• ΔS = +ve
• ΔS = -ve
• ΔS = 0
• ΔS = no change

Tags

NGSS.HS-PS1-5

NGSS.HS-PS3-4

Predict the entropy change, ΔS.

• ΔS = +ve
• ΔS = -ve
• ΔS = 0
• ΔS = little change

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4