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Phase Changes And Thermochemistry
Test Description: Chemistry Review
Instructions: Answer all questions to get your test result.
1) Which of the following best describes temperature?
A
a measure of the average kinetic energy of all of the particles in a sample of matter
B
all of the above
C
heat absorbed or released in a chemical or physical change
D
energy of change
2) Convert 94 degrees Celsius to Kelvin
A
179K
B
367K
C
399K
D
294K
3) The state of matter in which a material has neither a definite shape or definite volume is the
A
elemental state
B
gaseous state
C
solid state
D
liquid state
4) The compressibility of a liquid is generally
A
equal to that of a gas
B
less than that of a gas
C
zero
D
more than that of a gas
5) Particles within a solid
A
move randomly
B
vibrate in a fixed position
C
exchange positions easily
D
do not move
6) What is the process of a substance changing from a sold to gas vapor without passing through the liquid phase?
A
deposition
B
sublimation
C
condensation
D
vaporization
7) In a(n) ________ reaction, the products are at a higher energy level than the reactants
A
activation
B
catalytic
C
exothermic
D
endothermic
8) How many joules of heat are given off when 5.0 g of water cool from 75 degrees C to 25 degrees C? (specific heat of water = 4.18 j/g)
A
750
B
1000
C
500
D
1500
9) Matter that has a definite volume but no definite shape?
A
solid
B
liquid
C
plasma
D
gas
10) Matter that has no definite shape or volume and is a highly energized gas?
A
plasma
B
liquid
C
solid
D
gas
*select an answer for all questions
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