Using the following equation for the combustion of octane, calculate the heat associated combustion of 100.0 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
2 C8H18 + 25 O2 → 16 CO2 + 18 H2O
ΔH∘rxn = -11018 kJ

a) 535.4 kJ
b) -385.5 kJ
c) -602.3 kJ
d) -11018 kJ
e) -4819 kJ

kdkdkrnmcnc

explanation:

wisjndnfnnjjdjdjxn

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.