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JEE Main 20209 JanuaryMorning Shift
Exam
JEE Main
Year
2020
Date
9 January
Shift
Morning Shift
Subject
Chemistry
Chapter
Thermodynamics (C)

JEE Main 2020 · 9 January · Morning Shift · Chemistry · Thermodynamics (C)

If enthalpy of atomization for B r _ 2 ( l ) is xkJ / mol and bond...

If enthalpy of atomization for Br2(l)B{r}_{2} ( l ) is xkJ/molxkJ / mol and bond enthalpy for Br2B{r}_{2} is ykJ/molykJ / mol, the relation between themIf enthalpy of atomization for B r _ 2 ( l ) is xkJ / mol and bond enthalpy for B r _ 2 is ykJ / mol , the relation

Options

  1. Ais x=yx = y.
  2. Bdoes not exist.
  3. Cis x>yx > y.
  4. Dis x<yx < y.

Correct answer

C. is x>yx > y.

Step-by-step solution

If enthalpy of atomization for B r _ 2 ( l ) is xkJ / mol and bond enthalpy for B r _ 2 is ykJ / mol , the relation
∆Hatomisation=∆HVap+BondEnergy∆ {H}_{atomisation} = ∆ {H}_{Vap} + Bond E nergy
Hence x>yx > y

Enthalpy of atomization is enthalpy change involved when one mole of gaseous atom is formed from a substance in an elemental state (Elemental state of Bromine is Br2(l){Br}_{2} ( l )).

While, bond energy is energy required to break one mole of bonds in gaseous state to form separated atoms.

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