Heating Curve and Phase Change Diagram Flashcard

Front

Water exists as a _____________ at 700 mmHg and 50 °C.

Back

liquid

Front

What is the melting point of the substance shown in the heating curve graph?

Back

-60 °C

Front

Condensation is ...

Back

a change of state from a gas to a liquid.

Front

Sublimation (deposition) is ...

Back

a change of state from a solid directly into a gas.

Front

What is the boiling point of the substance shown in the heating curve graph?

Back

60 °C

Front

Define melting point.

Back

The temperature at which a solid becomes a liquid.

Front

What happens during vaporization?

Back

A liquid changes into a gas.

Front

What is the difference between evaporation and boiling?

Back

Evaporation occurs at the surface of a liquid at any temperature, while boiling occurs throughout the liquid at a specific temperature.

Front

What is a phase change diagram?

Back

A graphical representation showing the states of a substance at different temperatures and pressures.

Front

What is the significance of the plateau in a heating curve?

Back

It indicates a phase change where temperature remains constant while heat is added.