As we have seen scientists have grown increasingly worried a

As we have seen, scientists have grown increasingly worried about the potential for global warming caused by increasing atmospheric carbon dioxide levels. The world burns the fossil fuel equivalent of approximately 9.50

Solution

Part A) C8H18 + 12.5 O2 ----------> 8CO2 + 9H2O ,

moles of octane (C8H18) = 9.5 x10^ 15/( 114.23) = 8.316 x 10^ 13 ,

moles of CO2 = 8 x 8.316 x10^ 13 = 6.6528 x10^ 14 ,

mass of CO2 = 6.6528 x10^ 14 x 44 = 2.927 x10^ 16 gm = 2.927 x10^ 13 kg

part B) to double world require 5x10^ 15 kg CO2, = 5x10^ 18 gm ,

moles of CO2 = 5x10^ 18/44 = 1.136 x10^ 17 ,

moles of octane required = (1.136/8) x10^ 17 = 1.42 x10^ 16 ,

mass of octane = 1.42x10^ 16 x 114.23 = 1.62 x10^ 18 gm = 1.62 x10^ 15 kg ,

time requird = (1.62x10^ 15/9.5x10^12) = 170.52 years