Chemistry Concepts and Applications

Section 2: Energy and Changes of State

Self Check Quizzes

1
On the Kelvin scale, water boils at __________.

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A)0
B)373.15
C)273.15
D)212
2
At room temperature, gas particles move at roughly __________ m/s.
A)0.1 to 0.5
B)1 to 2
C)100 to 1000
D)10,000
3
At the same temperature, a steam burn may be more severe than a water burn because of water's high __________.
A)density
B)heat of vaporization
C)mass
D)polarity
4
The pressure of a substance in equilibrium with its liquid is called its __________.
A)freezing point
B)rate
C)temperature
D)vapor pressure
5
The energy released as 1 kg of a substance __________ at its freezing point is called its heat of fusion.
A)evaporates
B)condenses
C)melts
D)solidifies
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