If heat of formation of is kJ

CHEMISTRY · Single correct · A Level · Chemistry · Energetics · Energetics

Problem

If heat of formation of

NH_3(g)

-46

mol^{-1}

, then

\Delta H

for the reaction:

2NH_3 \rightleftharpoons N_2 + 3H_2

is: (1)

+46

kJ (2)

+92

kJ (3)

-92

kJ (4) None of these