AP Chemistry Gibbs

What is the role of a catalyst in a chemical reaction?

• A catalyst changes the products of the reaction.

• A catalyst speeds up the reaction by lowering the activation energy barrier.

• A catalyst slows down the reaction by increasing the activation energy barrier.

• A catalyst has no effect on the reaction rate.

Tags

NGSS.HS-PS1-5

The graph represents an

• Exothermic Reaction

• Endothermic Reaction

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

The catalyzed reaction has how many intermediates?

• 0

• 1

• 2

• 3

At the triple point, which of the following phases are present?

• Solid and Gas

• Gas and Liquid

• Liquid and Gas

• Gas, Liquid, and Gas

Tags

NGSS.MS-PS1-4

When a gas changes into a liquid (condensation), which of the following is taking place?

• Temperature increases

• Energy increases

• Temperature decreases

• Energy decreases

Tags

NGSS.MS-PS1-4

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.

Tags

NGSS.HS-PS1-4

What is Gibbs Free Energy?

• A measure of the maximum reversible work that may be performed by a thermodynamic system at constant temperature and pressure.

• The total energy of a system.

• The energy required to start a reaction.

• The energy lost as heat in a reaction.

Which equation represents Gibbs Free Energy?

• @@ \Delta G = \Delta H - T\Delta S @@

• @@ \Delta G = \Delta S - T\Delta H @@

• @@ \Delta G = T\Delta S - \Delta H @@

• @@ \Delta G = \Delta H + T\Delta S @@