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For the reaction C3H8(g) → 3C(g) + 8H(g), determine the enthalpy change (ΔHf) given that ΔHf for C2H2(g) → 2C(g) + 6H(g) is −620 kJ mol⁻¹.
- ΔHf = −620 kJ mol⁻¹
- ΔHf = −285.9 kJ mol⁻¹
- ΔHf = −241.8 kJ mol⁻¹
- None of these values are correct
Correct answer: None of these values are correct
Solution
The enthalpy change for the reaction C3H8(g) → 3C(g) + 8H(g) cannot be directly determined from the given information about the reaction C2H2(g) → 2C(g) + 6H(g), thus the correct answer is not listed among the options
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