Test 2 Flashcards
Thermal Decomposition
A chemical reaction due to heat
Chemical Change
Substance combined with another substance to form a new substance.
Physical Change
Are changes that affect the form of a substance.
S-curve or heating curve.
Phase Change Diagram
Diagram in the form of a S.
What Chemical thermally decomposed when you heated it and how do you know?
Sulfur
What is the difference between a chemical change and a physical change?
A chemical change is where one substance and another substance are combined to make another substance
A physical change is where the form of the substance changes, but it is still the same substance.
Give an example of a chemical change.
Iron oxide (or rust) on a piece of metal. Because of oxygen.
Give an example of a physical change
Breaking a glass
Phase Change
Matter changing from one state to another
Boiling/Evaporation
Evaporated is the process of a liquid changing into a vapor
Boiling is the action of a liquid to the temperature at which it bubbles and eventually turns into a vapor.
Condensation
Going from a gas to a liquid
Freezing
Going from a liquid to a solid
Melting
Going from a solid to a liquid
Solid
Stable shape, not a liquid or a fluid
Liquid
A substance that flows freely, but is of constant volume.
