Thermochemistry Quiz

In an endothermic reaction, heat is ...

• taken in or absorbed

• given out or released 

What is the standard enthalpy change for a reaction that is the sum of multiple steps known as?

• Activation enthalpy

• Reaction enthalpy

• Hess's law

• Bond enthalpy

Which quantity measures the spontaneous dispersal of energy at a specific temperature?

• Gibbs free energy

• Entropy

• Enthalpy

• Heat capacity

What is the enthalpy change called when 1 mole of a compound is formed from its elements in their standard states?

• Standard formation enthalpy

• Standard reaction enthalpy

• Bond enthalpy

• Activation enthalpy

• The process is non-spontaneous.

• The process is at equilibrium.

• The process is spontaneous.

• The process requires energy input.

Which law states that the total energy of an isolated system is constant?

• First law of thermodynamics

• Second law of thermodynamics

• Third law of thermodynamics

• Zeroth law of thermodynamics

What does the change in entropy of a system measure?

• The total energy absorbed by the system

• The disorder or randomness in the system

• The heat released by the system

• The work done by the system

In an exothermic reaction, how does the heat flow?

• From the surroundings to the system

• From the system to the surroundings

• Within the system only

• No heat flow occurs

What is the standard state of a substance?

• The state of a substance at 100°C and 1 atm pressure

• The state of a substance at 25°C and 1 atm pressure

• The state of a substance at 0°C and 1 atm pressure

• The state of a substance in its most stable form at 1 atm pressure and room temperature

Which term describes the heat content of a system?

• Entropy

• Enthalpy

• Gibbs free energy

• Internal energy