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Jam
Jam asked in Science & MathematicsChemistry · 8 years ago

Can anyone help me with this chemistry question!!?

Calculate the energies produced per gram when methane and butane are combusted

Delta H ( combustion) methane = -890KJmol-1

Delta H (combustion) butane = -2811KJmol-1

And this one calculate the mass of carbon dioxide formed when one gram of methane and butane are combusted ...

And on the basis of the answers above state which would be the more environmentally friendly fuel to use in power stations? Why?

Sorry for all the questions but need

Help please :)

Thanks :)

1 Answer

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  • ?
    Lv 6
    8 years ago
    Favorite Answer

    one gram of methane is 1/16 of a mole, so it will produce 890/16 = 55.6 kJ of energy

    One gram of butane is1/58 of a mole, so will produce 2811/58 = 48.47 kJ of energy.

    one gram of methane will produce 1/16 mole of CO2 = 44/16 = 2.75 g

    One gram of butane will produce 4/58 mole of CO2 = 3.03 g

    So it looks like methane is the better option; more energy and less CO2 per gram.

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