Question

Calculate heat of atomization of furan in KJmol^-1 using the data



Heats of atomization of C, H, O are 717, 218, 249 KJmol^-1 each. Fill your answer dividing by 100

Answer 1

Answer: 40.51

Writing the formation reaction

$4\text{C}\left(\text{s}\right)+4\text{H}\left(\text{g}\right)+\text{O}\left(\text{g}\right)\to {\left(\text{C}\right)}_4{\left(\text{H}\right)}_4\text{O}\left(\text{g}\right)$

$\Delta {\text{H}}_{\text{f}}^{{}^{\circ }}=-62\cdot 0={\text{Σ}}_{\text{reac}}\text{BE}-{\text{Σ}}_{\text{product}}\text{BE}$

${\text{Σ}}_{\text{product}}\text{ BE}={\text{Σ}}_{\text{reac}}\text{BE}+62\cdot 0$

$=4\times 717+4\times 218+249+62$

$=2868+872+249+62=4051\text{ KJ}{\text{ mol}}^{-1}$

${\text{Σ}}_{\text{product}}\text{ BE}$ is heat of atomization of product into isolated gaseous atoms.

Hence answer is 40.51