Thermodynamics and Kinetics

Which of the following is the correct definition of entropy?

• a thermodynamic quantity equivalent to the total heat content of a system. It is equal to the internal energy of the system plus the product of pressure and volume

• a thermodynamic quantity representing the unavailability of a system's thermal energy for conversion into mechanical work, often interpreted as the degree of disorder or randomness in the system.

• accompanied by or requiring the absorption of heat

• accompanied by the release of heat.

Which of the following best describes Le Chatelier's Principle?

• states that energy can neither be created nor destroyed

• a thermodynamic quantity equivalent to the total heat content of a system. It is equal to the internal energy of the system plus the product of pressure and volume.

• a thermodynamic quantity representing the unavailability of a system's thermal energy for conversion into mechanical work, often interpreted as the degree of disorder or randomness in the system

• stating that if a constraint (such as a change in pressure, temperature, or concentration of a reactant) is applied to a system in equilibrium, the equilibrium will shift so as to tend to counteract the effect of the constraint.

Choose all of the following that affect the rate of reactions?

• surface area

• temperature

• concentration

• None of the answers affect rate of reaction

Tags

NGSS.HS-PS1-5

For the reaction: Which direction would the chemical reaction flow if the pressure is increased?

• right

• left

Which of the following definitions best describes enthalpy?

• stating that if a constraint (such as a change in pressure, temperature, or concentration of a reactant) is applied to a system in equilibrium, the equilibrium will shift so as to tend to counteract the effect of the constraint.

• a thermodynamic quantity equivalent to the total heat content of a system. It is equal to the internal energy of the system plus the product of pressure and volume.

• a thermodynamic quantity representing the unavailability of a system's thermal energy for conversion into mechanical work, often interpreted as the degree of disorder or randomness in the system.

• states that energy can neither be created nor destroyed

Which of the following has the greatest entropy?

• chocolate milkshake

• vanilla milkshake

• cookies n cream milkshake

• strawberry milkshake

Tags

NGSS.HS-PS3-4

For the following reaction: Which direction would the chemical reaction flow if H2 is removed?

• right

• left

Tags

NGSS.HS-PS1-5

Use the potential energy diagram below to answer the following question: What type of reaction is shown?

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

Use the potential energy diagram below to answer the following question: What is the heat content of the reactants?

• 40 kj

• 10 kj

• 60 kj

• 20 kj

Tags

NGSS.HS-PS1-4

Use the potential energy diagram below to answer the following question: What is the activation energy of the reaction?

• 40 kj

• 60 kj

• 10 kj

• 20 kj

Tags

NGSS.HS-PS1-4