Chemistry - Thermochemistry Question with Solution | TestHub

(P) This is combustion reaction as well as formation reaction of ${\mathrm{CO}}_2$.

(Q) This is sublimation, atomization as well as formation reaction of $\mathrm{C}(\mathrm{g})$.

$(\mathrm{R})$ This is combustion reaction of $\mathrm{CO}(\mathrm{g}).(\mathrm{S})$ This is atomization of ${\mathrm{CH}}_4(\mathrm{g})$.