Phase Changes And Thermochemistry Question Preview (ID: 15329)


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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

Convert 94 degrees Celsius to Kelvin
a) 179K
b) 399K
c) 367K
d) 294K

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

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

Particles within a solid
a) do not move
b) exchange positions easily
c) move randomly
d) vibrate in a fixed position

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

In a(n) ________ reaction, the products are at a higher energy level than the reactants
a) activation
b) exothermic
c) endothermic
d) catalytic

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

Matter that has a definite volume but no definite shape?
a) solid
b) liquid
c) gas
d) plasma

Matter that has no definite shape or volume and is a highly energized gas?
a) solid
b) liquid
c) gas
d) plasma

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