Question

When NH3(g) reacts with O2(g) to form N2O(g) and H2O(l), 342 kJ of energy are evolved for each mole of NH3(g) that reacts. Write a balanced thermochemical equation for the reaction with an energy term in kJ as part of the equation.

Answer 1

Answer:
`2NH_3(g)+2O_2(g)\rightarrow N_2O(g)+3H_2O(l)+684kJ`

Step-by-step explanation:

The skeletal thermochemical equation for the reaction is:

`NH_3(g)+O_2(g)\rightarrow N_2O(g)+H_2O(l)+342kJ`

The balanced thermochemical equation for the reaction is:

`2NH_3(g)+2O_2(g)\rightarrow N_2O(g)+3H_2O(l)+684kJ`

When 1 mole of
`NH_3` reacts with oxygen , heat released = 342 kJ

Thus when 2 moles of
`NH_3` reacts with oxygen , heat released =
`(2)/(1)* 342 kJ=684kJ`