Sample 1Easy
Which of the following is NOT a state function?
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The answer is D.
A state function depends only on the state of the system and not on how that state was reached. Internal energy, enthalpy and entropy are state functions, while work and heat depend on the path followed.
- A.
Internal energy depends only on the state of the system, so it is a state function.
- B.
Enthalpy, H = U + pV, is built from state functions and is itself a state function.
- C.
Entropy is a state function; its change depends only on initial and final states.
NCERT: Class 11 Chemistry, Unit 5 (Thermodynamics), The State of the System and The Internal Energy as a State Function