For the process 2 F (g) → F2(g) the sign of ΔH and ΔS respectively are
+, -
+ , +
- ,-
- , +
The process 2 F (g) → F2(g) involves formation of bond between F atoms. Hence, ΔH = −ve. As randomness decreases.ΔS = −ve
For the reaction, 2Cl(g)→Cl2(g), what are the signs of Δ H and Δ S ?