Isooctane is a good model compound for gasoline. when 1.14 g of isooctane (114 g/mol) reacts with excess oxygen in a bomb calorimeter, the temperature of the calorimeter increases by 10.0oc. the heat capacity of the calorimeter is 5.46 kj/oc. determine the molar enthalpy of combustion of isooctane.

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in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm