LG06 - Physical and Chemical Changes of Matter

Front

What is the definition of a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is the definition of a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances, involving the breaking and forming of bonds.

Front

What is filtration and when is it used?

Back

Filtration is a separation technique used to separate an insoluble solid from a liquid by passing the mixture through a filter.

Front

What does the state symbol (s) represent?

Back

The state symbol (s) represents a solid phase of a substance.

Front

What does the state symbol (l) represent?

Back

The state symbol (l) represents a liquid phase of a substance.

Front

What does the state symbol (g) represent?

Back

The state symbol (g) represents a gaseous phase of a substance.

Front

What does the state symbol (aq) represent?

Back

The state symbol (aq) represents a substance that is dissolved in water, indicating an aqueous solution.

Front

What happens to intermolecular forces (IMFs) during a phase change from liquid to gas?

Back

During a phase change from liquid to gas, intermolecular forces (IMFs) become weaker as the molecules gain energy and move apart.

Front

At what temperature does iron(III) oxide (Fe3O4) remain solid?

Back

Iron(III) oxide (Fe3O4) remains solid at temperatures below its melting point, which is above 1200ºC.

Front

What phase is chlorine gas (Cl2) in at room temperature (25ºC)?

Back

Chlorine gas (Cl2) is in the gaseous phase at room temperature (25ºC).