The enthalpies of the elements in their standard states are arbitrarily assumed to be ?
A
zero at 298K and 1 atm
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B
unity at 298K and 1 atm
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C
zero at all temperatures
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D
zero at 273k and 1 atm
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Solution
The correct option is D zero at 298K and 1 atm The Enthalpies of the elements in their standard states are arbitrarily assumbed to be Zero at 298K and at 1 atm because the is no change involved in their formation