Phase Changes - Heating & Cooling Curves

Front

What is a heating curve?

Back

A heating curve is a graphical representation that shows the change in temperature of a substance as it is heated over time, illustrating phase changes and temperature increases.

Front

What is a cooling curve?

Back

A cooling curve is a graphical representation that shows the change in temperature of a substance as it cools over time, illustrating phase changes and temperature decreases.

Front

What is specific heat capacity?

Back

Specific heat capacity (c) is the amount of heat required to raise the temperature of one gram of a substance by one degree Celsius.

Front

What is latent heat?

Back

Latent heat is the amount of heat absorbed or released by a substance during a phase change without a change in temperature.

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What is the latent heat of fusion?

Back

The latent heat of fusion (ΔH_fus) is the heat required to convert a unit mass of a solid into a liquid at its melting point.

Front

What is the latent heat of vaporization?

Back

The latent heat of vaporization (ΔH_vap) is the heat required to convert a unit mass of a liquid into a gas at its boiling point.

Front

In which region of a heating curve does the substance exist as a solid?

Back

In Region 1 of a heating curve, the substance exists as a solid.

Front

In which region of a heating curve does the substance exist as a liquid?

Back

In Region 3 of a heating curve, the substance exists as a liquid.

Front

In which region of a heating curve does the substance exist as a gas?

Back

In Region 5 of a heating curve, the substance exists as a gas.

Front

What happens in Region 2 of a heating curve?

Back

In Region 2, the substance is undergoing a phase change from solid to liquid, and latent heat of fusion is being absorbed.