Many power plants produce energy by burning carbon-based fuels, which also produ

Question

Many power plants produce energy by burning carbon-based fuels, which also produces carbon dioxide. Carbon dioxide is a greenhouse gas, so over-production can have negative effects on the environment. Use enthalpy of formation data to calculate the number of moles of CO2(g) produced per megajoule of heat released from the combustion of each fuel under standard conditions (1 atm and 25 °C) (a) coal, C(s, graphite); (b) natural gas, CH4(g); Number Number mol MJ mol MJ (c) propane, CsHog) (c) propane, C3Hs(g); (d) octane, CHB((H250.1 kJ mo Number Number mol M.J mol MJ

Explanation / Answer

Get the balanced equation of the reaction.

to get 1 mega joule from octane (1 mole octane gives 250.1 KJ /mol)

2C8H18 + 25O2 ? 16CO2 + 18H2O

1KJ = 0.001mega joule . 1mole octane produce 0.250mega joule

4C8H18 + 50O2 ? 32CO2 + 36H2O

sso above equation will provide 1 megajoule

so there will produce 32 mole CO2

Use proportions.

2 mol C8H18.....16 mol CO2
------------------......--------------...
4 mol C8H18.......32 mol CO2

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