The value of Δ H f ∘ for C 8 H 18 ( l ) needs to be determined. Concept introduction: For the general reaction as follows: A + B → C + D For any reaction, the change in enthalpy change can be calculated as follows: Δ H ∘ = Δ H ∘ f ( C ) + Δ H ∘ f ( D ) − Δ H ∘ f ( A ) − Δ H ∘ f ( B )

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Chapter 9, Problem 9.18A

Interpretation Introduction

Interpretation:

The value of ΔHf∘ for C8H18(l) needs to be determined.

Concept introduction:

For the general reaction as follows:

A+B→C+D

For any reaction, the change in enthalpy change can be calculated as follows:

ΔH∘=ΔH∘f(C)+ΔH∘f(D)−ΔH∘f(A)−ΔH∘f(B)

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