What is the total volume of gaseous products, measured at 378°Cand 720. torr, wh

Question

What is the total volume of gaseous products, measured at 378°Cand 720. torr, when an automobile engine burns 100. g C8H18 (atypical component of gasoline)? (Hint: You must first balance thecombustion reaction for octane, C8H18.)
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Explanation / Answer

2C8H18(l) +25O2(g)-----> 16CO2(g) + 18H2O (l) The gaseous product is CO2 only in the conbustion ofoctane n(C8H18) = m/M = 100/114.224 = 0.8755mol n(CO2) = 16/2 x 0.8755 = 7.00mol 1 torr = 0.133322368kilopascals 720 torr = 95.9921053kilopascals pV = nRT 95.992 x V = 7 x 8.315 x 651 V(CO2) = 394.7L Hope this helps!

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