Q. For the reaction, $2Cl(g) \rightarrow Cl_2(g)$, the correct option is :
A) $\Delta_rH > 0$ and $\Delta_rS < 0$
B) $\Delta_rH < 0$ and $\Delta_rS > 0$
C) $\Delta_rH < 0$ and $\Delta_rS < 0$
D) $\Delta_rH > 0$ and $\Delta_rS > 0$
Explanation
[Solution] Bond formation releases energy ($\Delta H < 0$) and 2 mol of gas becomes 1 mol ($\Delta S < 0$). Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.