Energy and Phase Changes in Matter Quiz

Energy is the capacity to perform work or generate heat.

Solar energy is the main source of energy for the Earth, derived from the sun.

Temperature remains constant during a phase change as energy is used to change the state, not temperature.

Melting is the phase transition from a solid to a liquid.

Water boils at 100°C at standard atmospheric pressure.

Melting is a phase change where a substance absorbs energy to transition from solid to liquid.

The conservation of energy principle states that energy cannot be created or destroyed; it can only change forms.

The first law of thermodynamics asserts that energy cannot be created or destroyed, only changed from one form to another.

Deposition is the phase change where a gas transforms directly into a solid.

Sensible heat is the energy needed to increase the temperature of a substance without a phase change.

The critical point is where a substance exists in equilibrium with all of its phases coexisting.

Evaporation demands the highest energy input among phase changes.

Heat of vaporization is the energy needed for a substance to transition from a liquid to a gas at a constant temperature.

The triple point is where a substance exists in equilibrium between its solid, liquid, and gas phases.

Pressure does not affect the rate of evaporation.