Problem: At 298 K, the standard enthalpies of formation for C2H2(g) and C6H6(l) are 227 kJ/mol and 49 kJ/mol, respectively. a. Calculate ΔH° forC6H6 (l) → 3 C2H2 (g)

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FREE Expert Solution

H°rxn=H°f, product-H°f, reactant


C6H6(l) → 3 C2H2(g)

We’re given the following ΔH˚f values:

ΔH˚f C6H6(l) = 49 kJ/mol           

ΔH˚f C2H2(g) = 227 kJ/mol           


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Problem Details

At 298 K, the standard enthalpies of formation for C2H2(g) and C6H6(l) are 227 kJ/mol and 49 kJ/mol, respectively. 

a. Calculate ΔH° for

C6H6 (l) → 3 C2H2 (g)

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

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Our data indicates that this problem or a close variation was asked in Chemistry: An Atoms First Approach - Zumdahl 2nd Edition. You can also practice Chemistry: An Atoms First Approach - Zumdahl 2nd Edition practice problems.