Calculate the for if heat of formation of O-atoms is and , .

CHEMISTRY · Subjective · A Level · Chemistry · Energetics · Energetics

Problem

Calculate the

\Delta H

for

\text{NO}_2(g) \longrightarrow \text{NO}(g) + \text{O}(g)

if heat of formation of O-atoms is

249 \text{ kJ/mol}

and

\text{NO}(g) + \text{O}_3(g) \longrightarrow \text{NO}_2(g) + \text{O}_2(g); \Delta H = -200 \text{ kJ}

3\text{O}_2(g) \longrightarrow 2\text{O}_3(g); \Delta H = 285.4 \text{ kJ}