Vocab
Chemical
Physical
Elements and Atoms
Random
100
A change in which the identity of the substance remains the same, can change appearance
Physical Change
100
What is a chemical property?
Properties that can be determined by observing whether or not a substance can change into another substance under a set of conditions.
100
Which of these describes a physical change?
A. Wood is burned in a fire.
B. Milk is left out of the refrigerator and starts to smell.
C. Water crystallizes into ice after being placed in the freezer.
C. Water crystallizes into ice after being placed in the freezer.
100
CO2 + H2O → C6H12O6 + O2
What are the reactants?
CO2 + H2O
100
What is an endothermic reaction?
chemical reactions in which the reactants absorb heat energy from the surroundings to form products
200
Properties that can be determined by observing whether or not a substance can change into another substance under a set of conditions.
Chemical Properties
200
What is a chemical reaction?
A chemical change that changes the identity of a substance, the atoms are rearranged to produce a difference substance
200
List 3 examples of physical change.
melting, cutting hair, boiling water, etc.
200
CO2 + H2O → C6H12O6 + O2
What are the products?
C6H12O6 + O2
200
What is an exothermic reaction?
heat energy is given off during the reaction and the temperature increases
300
The original substance in a chemical reaction (left side of an equation)
Reactants
300
List 3 examples of a chemical change.
fireworks, lighting a candle, cooking a steak, making fried eggs, making cookies, etc.
300
What is a physical change?
A change in which the identity of the substance remains the same – any physical change that only changes the appearance
300
C6H12O6 + O2
How many Oxygen Atoms are there?
8
300
What is the Law of Conservation of Matter?
Matter cannot be created nor destroyed! Atoms are only rearranged. Energy can change form.
400
The substances that form in a chemical reaction (the right side of an equation)
Products
400
What are 3 signs that a chemical reaction may have taken place?
change in color, odor, a precipitate forms, energy is released as heat or light, a gas is released, etc.
400
NaCl + H2(CO2)2
List the total number of atoms.
Na - 1
Cl - 1
H - 2
O - 4
C - 2
400
How does temperature affect the rate of a chemical reaction?
Warmer temperature = reacts quicker = more movement
500
A solid that is produced as a result of a chemical reaction in a solution
Precipitate
500
What are 4 factors that affect the rate of a chemical reaction?
1. temperature
2. surface area
3. concentration
4. catalyst
500
Label the chemical equation using Product, Reactant, Subscript, Coefficient, and Yield.
C7H6O2 + O2 → 2CO + H2O.
Ms. Alexa will check your board.
500
What can happen when energy is transferred from one system to another?
the energy changes form