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20 questions
Between which two points is the substance melting?
A <----> B
B <----> C
C <----> D
D <----> E
E <----> F
Between which two points is the substance boiling?
A <----> B
B <----> C
C <----> D
D <----> E
E <----> F
From point A to point E, the sample is going through an
exothermic process by releasing heat to the surroundings
exothermic process by absorbing heat from the surroundings
endothermic process by releasing heat to the surroundings
endothermic process by absorbing heat from the surroundings
The melting point of the sample is
-60 ºC
-100 ºC
60 ºC
100 ºC
When you freeze water, it turns to ice. What kind of change is this?
endothermic
exothermic
What line segment represents only the liquid state?
A-B
B-C
C-D
D-E
What line segment represents only the gas state?
A-B
B-C
C-D
E-F
Between which points is the temperature of the substance changing?
A-B only.
A-B, C-D, E-F
B-C only.
B-C, D-E
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