MCQ
The heat of combustion of carbon is $-94\, kcal$ at $ 1$ atm pressure. The intrinsic energy of $C{O_2}$ is....$kcal$
- A$ + 94$
- ✓$ - \,94$
- C$ + 47$
- D$ - 47$
✓
Answer
Correct option: B.
$ - \,94$
(b) ${C_{(S)}} + {O_2}_{(g)} \to C{O_2}_{(g)}$, $\Delta {n_g} = 1 - 1 = 0$
$\therefore \Delta E = \Delta H = - 94\,\,kcal$
$\Delta E = {E_{C{O_2}}} - ({E_C} + {E_{{O_2}}})$$ = {E_{C{O_2}}} - (0 + 0)$
or ${E_{C{O_2}}} = \Delta E = - 94\,\,kcal.$
$\therefore \Delta E = \Delta H = - 94\,\,kcal$
$\Delta E = {E_{C{O_2}}} - ({E_C} + {E_{{O_2}}})$$ = {E_{C{O_2}}} - (0 + 0)$
or ${E_{C{O_2}}} = \Delta E = - 94\,\,kcal.$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The dipole moment is zero for the molecule
Among the following acids, the weakest one is
Chemistry is sometimes called as :
The electronic configuration of a dipositive ion $M^{2+}$ is $2,8, 14$ and its atomic mass is $56.$ The number of neutrons in the nucleus would be :
→The heat of combustion of benzene determined in a bomb calorimeter is $ - 870\,kcal\,mo{l^{ - 1}}$ at ${25\,^o}C$. The value of $\Delta E$ for the reaction is......$kcal$
→For $H-$atom, the energy required for the removal of electron from various sub-shells is given as under :
→The order of the energies would be :
Which of the following configuration is correct for iron
In neutral or faintly alkaline solution, $8$ moles of permanganate anion quantitatively oxidize thiosulphate anions to produce $X$ moles of a sulphur containing product. The magnitude of $X$ is
→In $IIIA$ group, $Tl$ (thalium) shows $+1$ oxidation state while other members show $+3$ oxidation state. Why
→Which one of the following has maximum number of atoms$?$
→