Things to remember (Chap 6)

Question 1

Heat (q)+

Answer 1

When heat is absorbed by the system from the surroundings (endothermic process).

Question 2

Heat (q)-

Answer 2

When heat is released by the system to the surroundings (exothermic process).

Question 2

Work (w)+

Answer 2

When work is done on the system by the surroundings (the system gains energy).

Question 3

Work (w)-

Answer 3

When work is done by the system on the surroundings (the system loses energy).

Question 3

Enthalpy Change (H)+

Answer 3

Indicates that the process is endothermic, meaning the system absorbs heat (e.g., melting or boiling).

Question 4

Enthalpy Change (H)-

Answer 4

Indicates that the process is exothermic, meaning the system releases heat (e.g., freezing or condensing).

Question 5

Potential energy

Answer 5

the energy stored in an object due to its position or configuration. It is dependent on the object’s position relative to other objects and the forces acting upon it.

Question 6

Kinetic energy

Answer 6

Kinetic energy is the energy of an object due to its motion. The faster an object moves, the more kinetic energy it possesses.