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Assuming that petrol is octane (C(8)H(18...

Assuming that petrol is octane `(C_(8)H_(18))` and has density `0.8 g//ml, 1.425 litre` of petrol on complete combustion will consume

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An aeroplane weighing 63,000 kg flies up from sea level to a height of 8000 meter. Its engine run with pure normal octane (C_(8)H_(18)) has a 30% efficiency. Calculate the fuel cost of the flight if octane sells at Rs. 3 per litre. Given density of octane =0.705 g mL^(-1) , heat of combustion of octane =1300 kcal mol^(-1) (g=981 m//s^(2))

The molarity of H_(2)SO_(4) is 18 M . Its density is 1.8 g mL^(-1) .

The standard enthalpy of formation of octane (C_(8)H_(18)) is -250kJ //mol . Calculate the enthalpy of combustion of C_(8)H_(18) . The enthalpy of CO_(2)(g) and H_(2)O(l) are -394 kJ//mol and -286kJ//mol respectively.

The molality of 90% (w/v) H_(2)SO_(4) solution is [density = 1.8 gm // ml ]

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