1. Tardigrade
  2. Question
  3. Chemistry
  4. Calculate resonance enthalpy of (CO)2(g) from the following data: Δ HC° C(. text graphite .)=-390kJ(mol)- 1 Δ HS° C(. text graphite .)=715kJ(mol)- 1 Δ HBE° [.O=O].=500kJmol- 1 Δ HBE° [.C=O].=875kJmol- 1

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Q. Calculate resonance enthalpy of $\left(CO\right)_{2}\left(g\right)$ from the following data:
$\Delta H_{C}^\circ C\left(\right.\text{ graphite }\left.\right)=-390kJ\left(mol\right)^{- 1}$
$\Delta H_{S}^\circ C\left(\right.\text{ graphite }\left.\right)=715kJ\left(mol\right)^{- 1}$
$\Delta H_{BE}^\circ \left[\right.O=O\left]\right.=500kJmol^{- 1}$
$\Delta H_{BE}^{^\circ }\left[\right.C=O\left]\right.=875kJmol^{- 1}$

NTA AbhyasNTA Abhyas 2020

Solution:

$C\left(\right.s\left.\right)+O_{2}\left(\right.g\left.\right) \rightarrow \left(CO\right)_{2}\left(\right.g\left.\right)$
$715+500-1750-R.E.=-390$
$R.E=-145kJmol^{- 1}$