bantuan dong abang kakak

Delta H = ( E C-C + 2E C-H + E C=N + 2E N-H) - ( E C rangap tiga N + 2E H-H)
=(83.1 + 2× 99.3 + 69.7 + 2× 93.4) - ( 104.2 + 2× 103.92)
= (83.1 +198.6 +69.7 +186.8) - (104.2 +207.84)
= 538.2 - 312.04
=226.16