Matter And Change Flashcards
What is an extensive property?
Depends on the amount of matter in a sample
How can properties be explained?
Intensive, extensive
What is an intensive property?
Depends on type of matter in a sample not the amount
What are the three states of matter?
Solid liquid gas
How can physical changes be classified?
Reversible or irreversible
What can mixtures be classified in to?
Heterogeneous mixtures and homogeneous mixtures
Can compounds be broken down?
Compounds can be broken down in to simpler substances by chemical means but elements cannot
Composition = fixed
Substance
Composition may vary
Mixture
During a chemical change what always changes?
Composition of matter
Clues to a chemical change
Change of colour, energy, gas bubbles (production of a gas), precipitate
During a chemical what stays the same
During any chemical reaction the mass of the products is always equal to the mass of the reactants
Methods of separation
Mechanical, settling, floation, filtration, extraction, fractional, crystallization
