Question: 2a)Using enthalpies of formation and other data, from the reference data provided below, calculate the net and gross calorific values for butane (C4H10) in units

2a)Using enthalpies of formation and other data, from the reference data provided below, calculate the net and gross calorific values for butane (C4H10) in units of MJ kmol-1 .

2b)The following data is obtained for a gas burner: Fuel: Butane (C4H10) Oxidant: Air Mixture: 3% fuel, 97% air (by volume) Fuel temperature: 15C Oxidant temperature: 160C Heat loss in combustion: 930 MJ kmol-1 (of fuel) Assume dissociation of the combustion products does not occur. Using your solution to part (a) and the reference data provided below, calculate:

The excess air in the fuel-oxidant mixture.

(ii) The oxygen content of the exhaust (vol%, dry).

(iii) The flame temperature.

2a)Using enthalpies of formation and other data, from the reference data provided

Enthalpies of formation at 298K(MJkmol1) Specific heat (kJkq1K1) Sensible enthalpies (relative to zero at 298K)(kJkmol1)

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