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Consider the following cases of standard enthalpy of reaction ( H _ r ^ . in . kJ mol ⁻¹ ) aligned & C ₂ H ₆( ~g )+ 7 2 O ₂( ~g ) 2 CO ₂( ~g )+3 H ₂ O ( l ) H ₁^ =-1550 & C (graphite) + O ₂( ~g ) CO ₂( ~g ) H ₂^ =-393.5 & H ₂( ~g )+ 1 2 O ₂( ~g ) H ₂ O ( l ) H ₃^ =-286 aligned The magnitude of H _ f C ₂ H ₆( ~g ) ^ is _______ kJ mol ⁻¹ (Nearest integer).

Correct answer

0

Step-by-step solution

aligned & 2 C _ (graphite) +3 H ₂( ~g ) C ₂ H ₆( ~g ) H _ f =? & C ₂ H ₆( ~g )+ 7 2 O ₂( ~g ) 2 CO ₂( ~g )+3 H ₂ O (l) & H ₁=-1550 & C _ (graphite) + O ₂( ~g ) CO ₂( ~g ) H ₂=-393.5 & H ₂( ~g )+ 1 2 O ₂( ~g ) H ₂ O (/) H ₃=-286 & H _ f =2 H ₂+3 H ₃- H ₁ & =95 ~kJ / mole ^2 aligned

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