Question

Which of the following reactions are exothermic or endothermic?
(i) 4C(s)+5H2(g)—*C4H10(g);AH =-123 kJ
(ii) HgO(s)+180.4 kJ →→Hg (1)+02 (8)
(iii) 0.5N2 (g)+1.5H2(g) →NH3(g)+45 kJ
(iv) SnO2 (s)+2CO(g)->Sn(s)+2002 – 360 kJ​

Answer 1

Answer:

exothermic 1&3

endothermic 2&4