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What is the energy density of the three fossil fuels (coal, natural gas, oil)? Express your...

What is the energy density of the three fossil fuels (coal, natural gas, oil)? Express your answer in both joules per kg and kilowatt-hours (kwh) per kg. Calculate the CO2 emitted per kwh of energy produced. Rank the three fossil fuels from highest to lowest emission of CO2.

Solutions

Expert Solution

Energy density* of the three fossil fuels are,

.................Fuel.................energy density in joules / kg.............................energy density in kWh / kg

......1 ) Coal.....................................2.63 x 107 ..........................................................7.37

.......2) Natural gas ........................5.56 x 107 ...........................................................15.54

.......3 ) Oil..................................... 4.63 x 107 ............................................................12.96

* Conversion factor :-

1 MJ = 0.28 kWh ; 1 MJ = 106 joules

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CO2 emissions per kWh of energy produced :-

The value of CO2 emission per kWh of energy produced from a source ( viz. fossil fuels ) depends upon a factor that indicates how many Kgs`of CO2 are released into atmosphere to produce 1kWh of electricity.This factor is used to calculate CO2 emission in a country. In terms of CO2 emission per kWh the fossil fuels have been ranked as

Coal > Oil > Natural gas

queen_honey_blossom answered 2 years ago
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