IB Chem Gibb's 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.

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.

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.

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

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

The SI unit of heat and energy is the __________.

• calorie
• heat
• joule
• watt

The __________ law of thermodynamics states that entropy is always increasing. 

• first
• second
• third
• zeroth

Heat transfer [blank] occurs from hot to cold. 

• always
• never
• sometimes
• rarely

ΔH value in an endothermic reaction is a positive number.

• True
• False