The standard heats of combustion ( r H) of buta-1,3-diene, C 4 H 6 (g); butane, C

The standard heats of combustion (Δ_rH°) of buta-1,3-diene, C₄H₆(g); butane, C₄H₁₀(g); and H₂(g) are -2540.2, -2877.6, and -285.8 kJ mol-1, respectively. Use these data to calculate the heat of hydrogenation of buta-1,3-diene to butane.

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C4H6(g) + 2 H₂(g) - C4H10(g) A,H° = ?