?Gasoline is composed primarily of hydrocarbons, including many with eight carbon atoms, called octanes. One of the cleanest–burning octanes is a compo

Chapter 5, Problem 5.77

(choose chapter or problem)

Gasoline is composed primarily of hydrocarbons, including many with eight carbon atoms, called octanes. One of the cleanest–burning octanes is a compound called 2,3,4- trimethylpentane, which has the following structural formula:

The complete combustion of one mole of this compound to \(\mathrm{CO}_{2}(g)\) and \(\mathrm{H}_{2} \mathrm{O}(g)\) leads to \(\Delta H^{\circ}=-5064.9 \mathrm{~kJ}\).

(a) Write a balanced equation for the combustion of 1 mol of \(\mathrm{C}_{8} \mathrm{H}_{18}(l)\).

(b) By using the information in this problem and data in Table 5.3, calculate \(\Delta H_{f}^{\circ}\) for 2,3,4-trimethylpentane.

Text Transcription:

CO2(g)

H2O(g)

\Delta H^{\circ}=-5064.9 kJ

C8H18(l)

\Delta H_{f}^{\circ}