Physics
NULL
Medium
Question
Which one is true for internal energy ?
A
It is sum of all forms of energies associated with molecules of a system
B
It is a state function of a system
C
It is proportional to transnational K.E of the molecules
D
All are correct
✓ Official correct answer
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A
It is sum of all forms of energies associated with molecules of a system
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B
It is a state function of a system
No member explanations yet for this option.
C
It is proportional to transnational K.E of the molecules
No member explanations yet for this option.
D
All are correct
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Explanation
Internal energy is the sum of all forms of molecular energy in a system, is a state function (depends only on the current state, not the path taken), and for an ideal gas is proportional to the molecules' translational kinetic energy -- all of these statements are correct.
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