Phase Changes And Thermochemistry Question Preview (ID: 15329)
Chemistry Review.
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Matter that has no definite shape or volume and is a highly energized gas?
a) solid
b) liquid
c) gas
d) plasma
Matter that has a definite volume but no definite shape?
a) solid
b) liquid
c) gas
d) plasma
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) 1500
b) 500
c) 750
d) 1000
In a(n) ________ reaction, the products are at a higher energy level than the reactants
a) activation
b) exothermic
c) endothermic
d) catalytic
What is the process of a substance changing from a sold to gas vapor without passing through the liquid phase?
a) condensation
b) vaporization
c) sublimation
d) deposition
Particles within a solid
a) do not move
b) exchange positions easily
c) move randomly
d) vibrate in a fixed position
The compressibility of a liquid is generally
a) less than that of a gas
b) zero
c) equal to that of a gas
d) more than that of a gas
The state of matter in which a material has neither a definite shape or definite volume is the
a) gaseous state
b) solid state
c) elemental state
d) liquid state
Convert 94 degrees Celsius to Kelvin
a) 179K
b) 399K
c) 367K
d) 294K
Which of the following best describes temperature?
a) heat absorbed or released in a chemical or physical change
b) all of the above
c) energy of change
d) a measure of the average kinetic energy of all of the particles in a sample of matter
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