Property Changes in Chemical Reactions

Physical change

• A change in shape or state

• A change in chemical composition

• A change that cannot be reversed

• A change in temperature only

Chemical reaction

• When substances change to make something new.

• A process where substances remain unchanged.

• A method of mixing ingredients without altering them.

• A reaction that only occurs in living organisms.

Thermal Conductivity

• A substance's ability to transfer heat

• A measure of a substance's density

• The temperature at which a substance melts

• The amount of heat required to raise the temperature of a substance by one degree

Malleability

• The ability for a substance to be pounded into different shapes.

• The ability of a substance to conduct electricity.

• The ability of a substance to dissolve in water.

• The ability of a substance to change its color.

Reactant

• What you start with in a chemical reaction.

• The substance produced at the end of a chemical reaction.

• A catalyst that speeds up the reaction.

• A byproduct that is not involved in the main reaction.

Solubility

• The ability of a substance to dissolve in another substance.

• The measure of how much solute can be dissolved in a solvent at a given temperature.

• The process of separating a mixture into its individual components.

• The temperature at which a substance changes from solid to liquid.

Density

• The amount of mass in a given volume of a substance.

• The total weight of an object regardless of its size.

• The measure of how much space an object occupies.

• The temperature at which a substance changes state.

Conservation of mass

• The principle that mass is not created or destroyed in a chemical reaction.

• Mass can be created or destroyed in a chemical reaction.

• The total mass of products is always greater than the total mass of reactants.

• Mass is only conserved in physical changes, not chemical changes.

Physical Change

• A change that affects the chemical properties of a substance.

• A change that affects the physical properties of a substance.

• A change that results in the formation of a new substance.

• A change that occurs only at high temperatures.

Chemical change

• A change that creates a new substance

• A change that only affects the appearance

• A change that can be easily reversed

• A change that involves mixing two substances without reaction