Endothermic and Exothermic Processes

What defines an endothermic process?

• Heat moves from the system into the surroundings.

• Heat moves from the surroundings into the system.

• The system feels cold.

• The system feels hot.

Which statement accurately describes an exothermic process?

• Heat moves from the surroundings into the system.

• Heat moves from the system into the surroundings.

• The system absorbs heat from the environment.

• The change in enthalpy (ΔH) is positive.

Which of the following phase changes is an endothermic process?

• Condensing

• Freezing

• Melting

• Deposition

What is the sign of the change in enthalpy (ΔH) for an exothermic process?

• Positive

• Negative

• Zero

• Depends on the substance