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29/09/2021 11:56 am
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The species which by definition has zero standard molar enthalpy of formation at 298 K is
(a) Br2(g)
(b) Cl2(g)
(c) H2O(g)
(d) CH4(g)
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29/09/2021 11:58 am
Correct answer: (b) Cl2(g)
Explanation:
The species in its elemental form has zero standard molar enthalpy of formation at 298 K. At 298K, Cl2 is gas while Br2 is liquid.