Discussion
Pick out the INCORRECT STATEMENT
Answer: B
The incorrect statement is Change in the internal energy in a cyclic process is not zero.
Internal energy is a state function: it depends only on the state, so its change depends only on the initial and final states. In a cyclic process the system returns to its starting state, so \(\Delta U = 0\), the opposite of the chosen statement.
The others are correct: for an ideal gas \(U\) depends only on temperature; \(\Delta U\) depends only on the end states; and internal energy does depend on the state of matter (a phase change at constant temperature changes \(U\)).
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