Phase Changes and heat transfer

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials. It occurs when faster-moving particles collide with slower-moving ones, transferring energy.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves. It does not require a medium to travel through, allowing heat to be transferred through empty space.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases). Warmer, less dense fluid rises while cooler, denser fluid sinks, creating a circulation pattern.

Front

What is condensation?

Back

Condensation is the phase change from a gas to a liquid. It occurs when gas particles lose energy and come together to form a liquid.

Front

What is sublimation?

Back

Sublimation is the phase change from a solid directly to a gas without passing through the liquid state. An example is dry ice turning into carbon dioxide gas.

Front

What is ionization?

Back

Ionization is the process of converting an atom or molecule into an ion by adding or removing charged particles, usually electrons.

Front

What is recombination?

Back

Recombination is the phase change from a plasma to a gas. It occurs when ions and electrons combine to form neutral atoms.

Front

What is the difference between conduction and convection?

Back

Conduction involves heat transfer through direct contact, while convection involves heat transfer through the movement of fluids.

Front

What is an example of heat transfer by radiation?

Back

An example of heat transfer by radiation is feeling the warmth of the sun on your skin, even when you are not in direct contact with it.

Front

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

Back

During a phase change, the temperature of a substance remains constant while it absorbs or releases heat.