Calculate the standard enthalpies of combustion at 25ᵒC of the following:​​(a) ​C4H8(g) + H2(g) à C4H10(g)​​ΔHᵒ = -2878.6kJ​(b)​C4H6(g) + 2H2(g) à C4H10(g)​​ΔHᵒ = -2543.5 kJ

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