Gibbs Free Energy

What does Gibbs Free Energy tell us?

• How much energy is given off by a reaction.

• The tendency of a reaction to become "random"

• How spontaneous a reaction is.

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

What information do we need to perform a calculation of Gibbs Free Energy?

• Enthalpy of the reaction.

• Entropy of the reaction.

• The temperature of the reaction in Kelvin.

• All of the above are needed.

Tags

NGSS.HS-PS3-1

Which of the following would most likely lead to a spontaneous reaction.

• A high negative enthalpy.

• A low negative enthalpy.

• A high positive enthalpy.

• A low positive enthalpy.

Tags

NGSS.HS-PS1-4

What are the best conditions to lead towards a spontaneous reaction?

• high negative enthalpy, high temp, high negative entropy

• high positive enthalpy, high temp, high negative entropy

• high negative enthalpy, low temp, high positive entropy

• high negative enthalpy, high temp, high positive entropy.

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

Your enthalpy is high and negative but your entropy is also negative. What type of temperature would you want to get a spontaneous reaction?

• low

• high

Tags

NGSS.HS-PS1-5

Your enthalpy is positive and your entropy is positive. What type of temperature would you want to ensure a spontaneous reaction.

• very high

• very low

Tags

NGSS.HS-PS1-5

Your enthalpy is +20 and your entropy is +5. Which temperature will give a spontaneous reaction?

• 0

• 4

• 8

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

Your enthalpy is -20 and your entropy is -8. Which temperature will give you a spontaneous reaction?

• 1

• 3

• 5

Tags

NGSS.HS-PS1-5

Which of the following situations demonstrates high entropy?

• water freezing

• water vaporizing

• steam condensing to water

A spontaneous reaction is more profitable to a company.

• True

• False

Tags

NGSS.HS-PS1-4

NGSS.HS-ETS1-3