Chemistry Final:: CHAPTER 2 Flashcards
(15 cards)
What are the Changes of Matter?
Define Physical Change
any change that alters the form or appearance of the substance but that does not make the substance into another substance
Define Chemical Change
change in matter that produces one or more substances
When you dissolve Alka Seltzer in water, physical or chemical?
Chemical
Water boiling at 100 degrees celsius physical or chemical
Physical
A human digesting food. Physical or Chemical
Chemical
Is the plant producing Chlorophyll chemical or physical
Chemical
Is rust on a car chemical or physical
Chemical
Where are the reactants and products of a chemical reaction located?
Reactants are before the “yield” sign and the products are after the “yield”
What is the principle of conservation of mass? What is an example?
Conservation of Mass: During a chemical reaction matter is created or destroyed
Example: Burning Wood
Define Open System:
matter can enter from or escape to its surroundings
Define Closed System:
matter is not allowed to enter or leave
Define Synthesis
Give an example:
when two elements form into one substance
A + B → AB
Define Decomposition
Give an example
when a substance forms into two elements
AB → A + B
Define Single Replacement
Give an example
one element replaces another element in a compound
A + BC → AC + B
Define Double Replacement
Give an example
Two elements replace each other in different compound
AB + CD → AD + CB
