# Problem: Calculate ΔH for the following reaction using the given enthalpies of formation. 2NO(g) + 5O2(g) → 2NO2(g) ΔHfNO(g) = 90.25 kJ mol-1 ΔHfNO2(g) = 33.18 kj mol-1 a. +57.07 kJ b. -57.07 kJ c. +114.14 kJ d. -114.14 kJ e. +66.36 kJ

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Calculate ΔH for the following reaction using the given enthalpies of formation.

2NO(g) + 5O2(g) → 2NO2(g)

ΔHfNO(g) = 90.25 kJ mol-1
ΔHfNO2(g) = 33.18 kj mol-1

a. +57.07 kJ

b. -57.07 kJ

c. +114.14 kJ

d. -114.14 kJ

e. +66.36 kJ

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Enthalpy of Formation concept. You can view video lessons to learn Enthalpy of Formation. Or if you need more Enthalpy of Formation practice, you can also practice Enthalpy of Formation practice problems.

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Based on our data, we think this problem is relevant for Professor Guloy's class at UH.