Question

Nitrogen dioxide, NO2(

Answer 1

Answer:84.6 kJ of energy released when 2.50 moles of nitrogen dioxide is decomposed.

Explanation:

$N(g)+O_2(g)\rightarrow NO_2(g),\Delta H_f=33.84 kJ/mol$

Energy released when 1 mole of $NO_2$ is formed = 33.84 kJ

And When 1 mole of $NO_2$ is decomposed it gives out 33.84 kJ of energy.

Energy released when 2.50 moles of nitrogen dioxide is decomposed:

$33.84 kJ\times 2.50 =84.6 kJ$

84.6 kJ of energy released when 2.50 moles of nitrogen dioxide is decomposed.

Answer 2

Answer:

C.

Explanation:

took the test