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Samuels PS Chemical Reactions
Test Description: Physical Science Chemical Reactions
Instructions: Answer all questions to get your test result.
1) The number of molecules of a substance involved in a reaction is indicated by the
A
reactant
B
catalyst
C
coefficient
D
product
2) The total mass of the reactant equal the total mass of the products is the
A
Law of Conservation of Matter
B
Law of Conservation of Mass
C
Law of Conservation of Energy
D
Law of Conservation of Charge
3) What does the arrow in a chemical reaction mean?
A
products
B
yield
C
reactants
D
equals
4) The new substances produced by a reaction are the _______?
A
catalysts
B
reactants
C
products
D
coefficients
5) What principle/law states that every chemical reaction causes a decrease in usable energy and an increase in entropy?
A
second law of kinetic energy
B
second law of thermodynamics
C
first law of thermodynamics
D
first law of kinetic energy
6) A chemical reaction that releases thermal energy is a ______ reaction.
A
exothermic
B
balanced
C
endothermic
D
kinetic
7) Entropy means _____.
A
mass
B
heat
C
disorder
D
catalyst
8) In thermodynamics, the part of the universe being studied is called the _____.
A
system
B
area
C
section
D
surroundings
9) A chemical reaction that has the same number of each type of atom on each side of the arrow is said to be ______.
A
equal
B
yielded
C
balanced
D
spontaneous
10) If a chemical reaction can occur by itself, without continuing outside help is it called ______.
A
yielded
B
equal
C
balanced
D
spontaneous
*select an answer for all questions
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