# Problem: From the enthalpies of reaction 2C(s) + O2(g) → 2CO(g)                             ΔH = -221.0 kJ 2C(s) + O2(g) + 4H2(g) → 2CH3OH(g)       ΔH = -402.4kJ calculate ΔH for the reaction:CO(g) + 2H2 → CH3OH(g) Express your answer with the appropriate units.

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84% (446 ratings) ###### Problem Details

From the enthalpies of reaction

2C(s) + O2(g) → 2CO(g)                             ΔH = -221.0 kJ

2C(s) + O2(g) + 4H2(g) → 2CH3OH(g)       ΔH = -402.4kJ

calculate ΔH for the reaction:

CO(g) + 2H2 → CH3OH(g)

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 Hess's Law concept. You can view video lessons to learn Hess's Law. Or if you need more Hess's Law practice, you can also practice Hess's Law practice problems.

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Our tutors rated the difficulty ofFrom the enthalpies of reaction 2C(s) + O2(g) → 2CO(g)      ...as medium difficulty.

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