Marcel slowly heated cold water until
it boiled, and he checked the temperature every minute. He recorded his results
in the data table below.
Use the information provided above to
answer the questions below.
21. The water temperature at minutes 4, 5, and 6 likely stayed
at 100*C because:
a) As the water gets hotter, the temperature increases more
slowly.
b) The water started to boil and the temperature will stay
at 100*C until it boils away.
c) The water started to boil but the temperature will begin
to increase again if more time is given.
d) There is no reason the water should have stayed at 100*C
unless Marcel made a mistake.
The best answer is answer b.
When any substance changes its physical
state, in this case from liquid to gas, the temperature remains constant until
all the substance is in gaseous form, when the temperature would then increase
again.
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Slichter