Some
questions and answers in heat and temperature
1. Explain why it is impossible for a
small amount energy to be transferred spontaneously from a large cold body at a temperature X°C to large at object at temperature Y°C?
When two of at different
temperature are brought together to have a
thermal contact heat(energy) flow the high temperature body ( hot hotter
body) to the low temperature body (colder body) until they reach thermal
equilibrium, thermal equilibrium means that the two body are literally at same
temperature. Heat must flow from the high temperature body to the low
temperature body, the hot object losses its energy to the cold object until
they both have same temperature,
Therefore energy in nature only flows in one direction and not vice versa.
2. Is it possible to for two objects to
be in thermal equilibrium if they are not in contact with each other?
Yes it is possible for
two bodies not in contact with each other to be in thermal equilibrium.’
According to the zeroth
law of thermodynamics “if two bodies are separately in thermal equilibrium with
a third body, then they are in thermal equilibrium with each other” in other
word if body A and body B are in thermal equilibrium with another body C, then
both A and B are in thermal equilibrium with each other. The bodies A and B are
not in physical contact which other but they have same temperature as body C,
therefore they are also at same temperature with each other, the body C can be
a thermometer use to compare temperature between separate objects.
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