Thermodynamics & Thermochemistry | JEE Main 2025 Solution

JEE MAIN 2025

24-01-2025 SHIFT-2

Question

$\mathrm{S}(\mathrm{g})+\frac{3}{2} \mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{SO}_{3}(\mathrm{~g})+2 x \mathrm{kcal}$
$\mathrm{SO}_{2}(\mathrm{~g})+\frac{1}{2} \mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{SO}_{3}(\mathrm{~g})+y \mathrm{kcal}$
The heat of formation of $\mathrm{SO}_{2}(\mathrm{~g})$ is given by :

Select the correct option:

$2 x+y \mathrm{kcal}$

$y-2 x \mathrm{kcal}$

$\frac{2 x}{y} \mathrm{kcal}$

$x+y \mathrm{kcal}$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution