Temperature - Time Graphs

Front

What is a temperature-time graph?

Back

A temperature-time graph is a visual representation that shows how the temperature of a substance changes over time.

Front

What does a flat line on a temperature-time graph indicate?

Back

A flat line indicates that the temperature is constant, meaning the substance is undergoing a phase change.

Front

What happens to the temperature of a substance during melting?

Back

During melting, the temperature remains constant as the substance absorbs heat to change from solid to liquid.

Front

What is the phase of a substance when it is at a temperature below its freezing point?

Back

The substance is in a solid phase.

Front

What is the phase of a substance when it is at a temperature above its boiling point?

Back

The substance is in a gaseous phase.

Front

What does the slope of a line on a temperature-time graph represent?

Back

The slope represents the rate of temperature change over time.

Front

What is the significance of the melting point on a temperature-time graph?

Back

The melting point is the temperature at which a solid becomes a liquid, marked by a flat line on the graph.

Front

What is the significance of the boiling point on a temperature-time graph?

Back

The boiling point is the temperature at which a liquid becomes a gas, also marked by a flat line on the graph.

Front

How can you identify the liquid phase on a temperature-time graph?

Back

The liquid phase is represented by the section of the graph where the temperature increases with time and is not flat.

Front

What happens to the particles of a substance during a phase change?

Back

During a phase change, the particles either gain or lose energy, which affects their movement and arrangement.