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Using the Information below determine the change in enthalpy for the following reaction: 2NO (g) +...

Using the Information below determine the change in enthalpy for the following reaction:

2NO (g) + 5H2 (g)!2NH3 (g) + 2H2O (l)

H2 (g) + 1⁄2O2 (g)!H2O (l) ΔH° = -285.8 kJ

N2 (g) + O2 (g)!2NO (l) ΔH° = +180.5 kJ

2NH3 (g)!N2 (g) + 3H2 (g)ΔH° = +92.22 kJ

a)-197.52 kJ

b)-241.7 kJ

c)-483.3 kJ

d)-659.88 kJ

e)-844.3 kJ

please show me which equation is first second and thrid and reason why? i may be taking the wrong approach here hess's law

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