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NEET UG CHEMISTRY MCQ: THERMODYNAMICS
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The heat of formation is the change in enthalpy accompanying the formation of a substance from its elements at 298 K and 1 atm pressure. Since, the enthalpies of elements in their most stable state are taken to be zero, the heat of formation of compounds is :
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Correct option: C
Standard heat enthalpy of that compound
Option C (Standard heat enthalpy of that compound) is correct because the heat of formation is defined as the enthalpy change when one mole of a compound is formed from its elements in their standard states.
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For which of the process, ∆S is negative?
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Reason :- During phase transition work done is always negative. For the reaction, at . Hence, is