Types of Reaction & Changes (Chemical Changes (Changes in states of…
Types of Reaction & Changes
occurs when a substance reacts and forms
one or more new substance
Changes in states of matter
also known as chemical reaction
release of heat and light
a chemical reaction that releases heat
energy released > energy required to break bonds
Chemical reaction that absorbs energy and heat from its surroundings.
More energy is needed to seperate the bonds in the reactant.
Energy of the reactants is inferior to the energy in the resulting product.
Heat + Energy (R) = Energy (P)
Total amount of energy before and after the reaction is the same.
a change that occurs and doesn't change the chemical composition of the substance.
a substance changing from one state of matter to another
the temperature does not change
types of physical changes
liquid to a solid
solid to a liquid
liquid to a gas
gas to a liquid
gas to a solid
solid to a gas
when water turns from a liquid to a solid
water to ice
the water molecules stay the same
when you physically break something
breaking a glass
another form of physical change comes from