Heating and Cooling Curves

Flashcards covering key concepts of heating and cooling curves and phase changes in chemistry.

Law of Conservation of Energy

Energy cannot be created or destroyed, only transformed from one form to another.

Heat (symbol)

Represented by the symbol 'q' in chemistry.

SI unit of heat and energy

Measured in Joules (J).

Heat curve

A graphical representation of the phase changes of a substance as it is heated.

Cooling curve

A graph that shows the phase changes of a substance as it cools down.

Sloped sections of a heating curve

Represent phases where the substance is heating up (solid, liquid, gas) with increasing temperature.

Plateaus in a heating curve

Indicate phase changes such as melting and boiling points where temperature remains constant.

Melting Point (MP)

The temperature at which a solid transforms into a liquid, requiring energy to break intermolecular forces.

Boiling Point (BP)

The temperature at which a liquid transforms into a gas, needing more energy to overcome intermolecular forces.