SPS7d Phase Changes - Heating & Cooling Curves

Front

What is a phase change?

Back

A phase change is a transition of matter from one state (solid, liquid, gas) to another, such as melting, freezing, boiling, or condensing.

Front

What is a heating curve?

Back

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

Front

In which region of a heating curve is a substance a solid?

Back

Region 1, where the temperature is below the melting point.

Front

In which region of a heating curve is a substance a liquid?

Back

Region 3, where the temperature is above the melting point and below the boiling point.

Front

What happens during the melting phase?

Back

During melting, a solid absorbs heat and changes into a liquid at a constant temperature.

Front

What happens during the freezing phase?

Back

During freezing, a liquid releases heat and changes into a solid at a constant temperature.

Front

What is the significance of line segment BC on a heating curve for water?

Back

Line segment BC represents the phase change from solid (ice) to liquid (water) where both phases coexist.

Front

What occurs in Region 2 of a heating curve?

Back

Region 2 is where the phase change from solid to liquid occurs, and the temperature remains constant.

Front

What is the temperature behavior in Region 1 of a heating curve?

Back

In Region 1, the temperature of the solid increases as heat is added.

Front

What is the temperature behavior in Region 3 of a heating curve?

Back

In Region 3, the temperature of the liquid increases as heat is added.