Question #ad2cf

1 Answer
Apr 30, 2017

Answer:

#Δ_text(c)H = "-1228 kJ/mol"#

Explanation:

#"H-C≡C-H" + "2.5O=O" → "2O=C=O" + "H-O-H"#

#Δ_text(c)H = sumD("reactants") - sumD("products")#

#Δ_text(c)H = "2D(C-H) + D(C≡C) + 2.5D(O=O) -4D(C=O) – 2D(O-H)" = ("2×413 + 839 + 2.5×495 – 4×799 – 2×467) kJ/mol" = "(826 + 839 + 1237.5 – 3196 – 934) kJ/mol" = "-1228 kJ/mol"#