Answer to Question #243417 in General Chemistry for jena

Question

Direction:Solve the following items. Show complete solution.Express all enthalpy changes to kilojoules.

2C8H18(l) + 25O2(g) →16CO2(g) + 18H2O(l) .Calculate the heat of combustion of octane using the supplied heat of formation data. Data: C8H18(l): –249.9 kJ mol^–1; CO2(g): –393.5 kJ mol^–1; H2O(l): –285.8 kJ mol^–1

Answer 1

249 -393.5+285.8

= 141.3Kj