Physical and Chemical Change Flashcards
(19 cards)
A physical change is…
A physical change is a phase change that involves a change in energy where the molecules move in different ways to change states or phases between solid, liquid and gas.
A chemical change is…
A chemical change is a process where substances transform into different substances with new chemical properties when there is a change in energy.
What is the most common form of energy involved in a chemical reaction?
The most common form of energy involved in chemical reactions is thermal energy (heat), which is associated with the movement (kinetic energy) of particles.
What is the Kinetic Molecular Theory?
The Kinetic Molecular Theory states that all particles and molecules and in a constant random motion and can help to explain phase or state changes.
Thermal energy is…
Thermal energy is the energy any substance has at a particular temperature.
What is sublimation?
Sublimation is the process of turning a solid into a gas by applying thermal energy when particles move and separate from one another.
What is the process of condensation?
Condensation is the process of turning a gas into a liquid by removing thermal energy when particles move slower and come close together.
What is boiling?
Boiling is vaporisation at a substance’s boiling point, which is the temperature at which a liquid forms bubbles of gas beneath the surface.
Evaporation is…
Evaporation is the phase change from a liquid to a gas.
Freezing is…
Freezing is the process of turning a liquid into a solid by removing thermal energy. The particles stop moving around and stay in a fixed position where they can only vibrate.
What is deposition?
Deposition is the process of turning a gas into a solid by removing thermal energy. THe particles stop moving and become more attracted to one another.
What is conduction?
Conduction is a process in which thermal energy is transferred between particles when they make direct contact with each other.
What is convection?
Convection is a process in which thermal energy is transferred between particles wia the movement of liquid or gas particles.
What is the process of thermal radiation?
The process of thermal radiation is when thermal energy is transferred in the form of electromagnetic waves.
What happens during chemical reactions?
Chemical reactions occur when energy breaks apart the bonds within chemical reactants and then the atoms rearrange to form products.
What is electromagnetic radiation energy?
Electromagnetic radiation energy is energy that consists of electromagnetic waves.
The law of conservation of mass states…
The law of conservation of mass states that matter cannot be created or destroyed.
What is a single displacement reaction?
A single displacement reaction is a chemical reaction in which a more reactive element takes the place of a less reactive element in a compound.
Molten is…
Molten is a melted substance.
