Heating Curves

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 such as melting and boiling.

Front

During which segment of the heating curve can both solid and liquid phases coexist?

Back

The BC segment of the heating curve represents the melting phase, where solid and liquid water coexist.

Front

What is the boiling point of water on a heating curve?

Back

The boiling point of water is 100°C at standard atmospheric pressure.

Front

True or False: Melting and freezing occur at the same temperature.

Back

True.

Front

What happens to particle movement at higher temperatures?

Back

Particles in an object move faster at higher temperatures.

Front

What is the significance of the flat segments on a heating curve?

Back

The flat segments indicate phase changes where temperature remains constant while heat is added or removed.

Front

What does segment AB on a heating curve represent?

Back

Segment AB represents the heating of a solid where temperature increases until it reaches the melting point.

Front

What does segment CD on a heating curve represent?

Back

Segment CD represents the boiling of a liquid where temperature remains constant at the boiling point.

Front

What is the melting point of a substance?

Back

The melting point is the temperature at which a solid turns into a liquid.

Front

How does pressure affect boiling points?

Back

Increased pressure raises the boiling point of a substance, while decreased pressure lowers it.