The second law of thermodynamics tells us that heat naturally flows from a hot object (such as molten lava, shown here flowing into the ocean in Hawaii) to a cold one (such as ocean water, which is heated by the lava to make steam). Is it ever possible for heat to flow from a cold object to a hot one? (i) Yes, no matter what the temperature difference; (ii) yes, but for only certain temperature differences; (iii) no; (iv) answer depends on the compositions of the two objects.
The second law of thermodynamics tells us that heat naturally flows from a hot object (such as molten lava, shown here flowing into the ocean in Hawaii) to a cold one (such as ocean water, which is heated by the lava to make steam). Is it ever possible for heat to flow from a cold object to a hot one? (i) Yes, no matter what the temperature difference; (ii) yes, but for only certain temperature differences; (iii) no; (iv) answer depends on the compositions of the two objects.
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Question
The second law of
us that heat naturally flows from a hot
object (such as molten lava, shown here
flowing
into the ocean in Hawaii) to a cold
one (such as ocean water, which is heated
by the lava to make steam). Is it ever
possible
for heat to flow from a cold object
to a hot one? (i) Yes, no matter what the
temperature difference; (ii) yes, but for only
certain temperature
differences;
(iii) no;
(iv) answer depends on the compositions of
the two objects.
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