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How many of the following has zero standard molar enthalpy of the formation at 298 K?
[IIT JEE 2010]
    Correct answer is '2'. Can you explain this answer?
    Verified Answer
    How many of the following has zero standard molar enthalpy of the form...
    Explanation:
    As mentioned in above problem, the standard molar enthalpy of formation of element in its standard state is taken as zero. Since the standard state of Cl2 is gas, its ΔfHo = 0.
    However, Br2 is also an element but its standard state is liquid.
    Conclusion:
    The correct option is: '2'.
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    How many of the following has zero standard molar enthalpy of the formation at 298 K?[IITJEE2010]Correct answer is '2'. Can you explain this answer?
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