AP Chemistry Quiz
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THERMOCHEMISTRY
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Use Hess's law to determine ΔH\Delta H for the target reaction: Target: 2NO(g)+O2(g)→2NO2(g)\mathrm{2NO(g) + O_2(g) \rightarrow 2NO_2(g)} Given: 1) N2(g)+O2(g)→2NO(g)\mathrm{N_2(g) + O_2(g) \rightarrow 2NO(g)} ΔH=+180 kJ\Delta H = +180\ \text{kJ} 2) N2(g)+2O2(g)→2NO2(g)\mathrm{N_2(g) + 2O_2(g) \rightarrow 2NO_2(g)} ΔH=+66 kJ\Delta H = +66\ \text{kJ}
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