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Question
Use the graph and diagram to answer the question.
A graph and diagram showing that ice melts at 0°C, water heats, and boils at 100°C.
Which is the best interpretation of the two flat portions of the graph?
(1 point)
Responses
These show where thermal energy does not exist.
These show where thermal energy does not exist.
These show where changes of state are occurring.
These show where changes of state are occurring.
These show where temperature is 0ºC.
These show where temperature is 0ºC.
These show where kinetic energy is increasing.
1 answer
The best interpretation of the two flat portions of the graph is:
These show where changes of state are occurring.
During these flat regions (the melting and boiling points), the temperature remains constant as thermal energy is added or removed, indicating a change of state (from solid to liquid and from liquid to gas, respectively).
