Resonance in X _2 Y can be represented as \stackrel{⊖}{X}=\stackrel{⊕}{X}=\stackrel{..}{Y} _{¨}\leftrightarrow: X \equiv \stackrel{⊖}{X}-\stackrel{‥^{⊖}{Y}} _{¨}: ─── The enthalpy of formation of X_2 Y ( X \equiv X ( g )+\frac{1}{2} Y = Y ( g ) \rightarrow X _2 Y ( g )) is 80 kJ mol ^{-1}. The magnitude of resonance energy of X _2 Y is \_\_\_\_ kJ mol ^{-1} (nearest integer value) Given : Bond energies of X \equiv X, X=X, Y=Y and X=Y are 940,410,500 and 602 kJ mol ^{-1} respectively. Valence X: 3, Y: 2 [8 Apr 2025 Shift 2]

Chemical Thermodynamics Part 3

Section: Chemistry

Question : 11 of 22

Marks: +1, -0

Resonance in X2Y can be represented as ‌

⊖

⊕

↔:X≡

⊖

−

⊖

‥

:
‌─── The enthalpy of formation of X2Y(X≡X(g)+‌

Y=Y(g)⟶X2Y(g)) is 80kJmol−1.
The magnitude of resonance energy of X2Y is ____ kJmol−1 (nearest integer value)
Given : Bond energies of X≡X,X=X,Y=Y and X=Y are 940,410,500 and 602kJmol−1 respectively.
Valence X:3,Y:2

[8 Apr 2025 Shift 2]

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