(Solved): a) If coal has the formula \( \mathrm{CH}_{0.8} \mathrm{O}_{0.2} \) and it yi ...

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a) If coal has the formula \( \mathrm{CH}_{0.8} \mathrm{O}_{0.2} \) and it yields \( 40 \mathrm{MJ} / \mathrm{kg} \) what is its carbon intensity in \( \mathrm{gC} / \mathrm{MJ} \) ? b) If oil has the formula \( \mathrm{C}_{7} \mathrm{H}_{13} \) and it yields \( 45 \mathrm{MJ} / \mathrm{kg} \) what is its carbon intensity in \( \mathrm{gC} / \mathrm{MJ} \) ? c) An automobile is driving at an average power of \( 100 \mathrm{~kW} \) and an average speed of 60 \( \mathrm{mph} \), what distance would it have to travel (in miles) to equal the energy in one barrel of oil \( \left(5.8 \times 10^{6} \mathrm{Btu}\right) \) ? d) An explosive expert would like to know how much energy in Btu is in one metric tonne of TNT? The expert is told 1 ton of TNT is \( 4.2 \times 10^{9} \) joules.