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Answer:
Internal energy is defined as the energy associated with the random, disordered motion of molecules. It is separated in scale from the macroscopic ordered energy associated with moving objects; it refers to the invisible microscopic energy on the atomic and molecular scale.
Explanation:
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Answer:
entropy is due to the random and disorderly motion of the molecules of a substance.
Entropy, the measure of a system's thermal energy per unit temperature that is unavailable for doing useful work. Because work is obtained from ordered molecular motion, the amount of entropy is also a measure of the molecular disorder, or randomness, of a system.
Entropy is an important concept in the branch of physics known as thermodynamics
Characteristics of entropy
We now introduce the thermodynamic property entropy, which is a measure of the amount of molecular disorder within a system. A system possessing a high degree of molecular disorder (such as a high-temperature gas) has a high entropy and vice versa. Values for specific entropy are commonly listed in thermodynamic tables along with other property data (e.g., specific volume, specific internal energy, specific enthalpy). A fundamental property related to the SLT, entropy has the following characteristics:
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The entropy of a system is a measure of its internal molecular disorder.
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A system can only generate, not destroy, entropy.
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The entropy of a system can be increased or decreased by energy transports across the system boundary
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