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NEET UG CHEMISTRY MCQ: THERMODYNAMICS
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The enthalpies of elements under the following conditions are assumed to be
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Correct option: A
Zero at 298 K and 1 atm
Option A (Zero at 298 K and 1 atm) is correct because the standard enthalpy of formation of an element in its standard state is defined as zero at 298 K and 1 atm.
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Reason :- During phase transition work done is always negative. For the reaction, at . Hence, is