Question

Which does respresent an exothermic reaction:-
(1) 2HgO (s) + 180 kJ → 2Hg(1) + O2(s)
(2) N2O(g) + C(s) CO(g) + N2(g) - 131 kJ
(3) N2(g) + O2(g) + 2NO(g) ; AH = +181 kJ
(4) CH2(g) + 2H2(g) → CH.(g); AH = -314 kJ​

Answer 1

Answer:

(4)CH2(g) + 2H2(g) → CH.(g); AH = -314 kJ​

Explanation: