Question

Where should ΔH be written for endothermic reaction - With reactants or in the products side? Similarly, where should ΔH be written for exothermic reaction? Also give examples for both of these - Endo and Exothermic on where to write ΔH.

Answer 1

In endothermic reaction heat sign will be written on the reactants side...
For exo it will be on the products side...
Exo-
C(s) +O2(g) - CO2 + HEAT...
Endo-
N2 + O2 + heat- 2NO

Answer 2

Answer:

The correct answer is option number 3