What is true about energy that is added to a closed system?
2 answers:
Answer:
B. It does work or increases thermal energy.
Explanation:
As we know by first law of thermodynamics that
now we have
so internal energy is based on the change in temperature of the gas
Q = heat given to the system
W = work done by the gas
now we know that when heat is given to the system then by energy conservation work some of its heat is used to increase the temperature of gas as its internal energy and other part of heat is used to do some work.
so correct answer will be
B. It does work or increases thermal energy.
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To develop this problem we will start from the definition of entropy as a function of total heat, temperature. This definition is mathematically described as
Here,
Q = Total Heat
T = Temperature
The total change of entropy from a cold object to a hot object is given by the relationship,
From this relationship we can realize that the change in entropy by the second law of thermodynamics will be positive. Therefore the temperature in the hot body will be higher than that of the cold body, this implies that this term will be smaller than the first, and in other words it would imply that the magnitude of the entropy 'of the hot body' will always be less than the entropy 'cold body'
Change in entropy is smaller than
Therefore the correct answer is C. Will always have a smaller magnitude than the change in entropy of the cold object