Honors U4 Zone 2: Enthalpy and Phase Change

Front

What is the boiling point?

Back

The temperature at which a liquid turns into a gas.

Front

What is a phase in the context of states of matter?

Back

A part of a system with uniform composition and properties.

Front

What is vapor in the context of states of matter?

Back

A gas in contact with its liquid.

Front

What is equilibrium vapor pressure of a liquid?

Back

The pressure exerted by a vapor in equilibrium with its liquid at a given temperature.

Front

What affects the equilibrium of vapor pressure?

Back

Temperature and intermolecular forces.

Front

Define enthalpy.

Back

A measure of the total energy of a thermodynamic system, including internal energy and the energy required to displace its environment.

Front

What is a phase change?

Back

A transition of matter from one state to another, such as solid to liquid or liquid to gas.

Front

What is latent heat?

Back

The amount of heat required to change the phase of a substance without changing its temperature.

Front

What is the difference between evaporation and boiling?

Back

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

Front

What is the significance of the phase diagram?

Back

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