Question

Using the following equation for the combustion of octane, calculate the heat (in kcal) associated with the combustion of 176.80 g of octane assuming complete combustion. The molar mass of octane is 114.33 g/mole. The molar mass of oxygen is 31.9988 g/mole. Make sure to include the correct sign on your answer. 2C$_8$H$_{18}$ + 25O$_2$ $\rightarrow$ 16CO$_2$ + 18H$_2$O $\Delta$H$^\circ$$_{rxn}$ = -11018 $\frac{kJ}{mole}$ Energy change = kcal

          Using the following equation for the combustion
of octane, calculate the heat (in kcal) associated
with the combustion of 176.80 g of octane
assuming complete combustion.
The molar mass of octane is 114.33 g/mole. The
molar mass of oxygen is 31.9988 g/mole. Make
sure to include the correct sign on your answer.
2C$_8$H$_{18}$ + 25O$_2$ $\rightarrow$ 16CO$_2$ + 18H$_2$O
$\Delta$H$^\circ$$_{rxn}$ = -11018 $\frac{kJ}{mole}$
Energy change = 
kcal

Using the following equation for the combustion
of octane, calculate the heat (in kcal) associated
with the combustion of 176.80 g of octane
assuming complete combustion.
The molar mass of octane is 114.33 g/mole. The
molar mass of oxygen is 31.9988 g/mole. Make
sure to include the correct sign on your answer.
2C8H18 + 25O2 → 16CO2 + 18H2O
ΔH^∘rxn = -11018 (kJ)/(mole)
Energy change =
kcal

Added by Susana G.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Madhur L

08/10/2023

Step 1

Step 1: Convert the mass of octane to moles. Show more…

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Using the following equation for the combustion of octane, calculate the heat (in kcal) associated with the combustion of 176.80 g of octane assuming complete combustion. The molar mass of octane is 114.33 g/mole. The molar mass of oxygen is 31.9988 g/mole. Make sure to include the correct sign on your answer. 2C8H18 + 25O2 → 16CO2 + 18H2O kJ ΔH rxn = -11018- mole Energy change = kcal