2. Most of the petroleum stock located on Earth is likely to be used up in 50 to 100 years if petroleum consumption is m

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2 Most Of The Petroleum Stock Located On Earth Is Likely To Be Used Up In 50 To 100 Years If Petroleum Consumption Is M 1 (29.1 KiB) Viewed 108 times

2. Most of the petroleum stock located on Earth is likely to be used up in 50 to 100 years if petroleum consumption is maintained at the current rate. With a view to cutting down petroleum consumption, some countries have adopted an alternative fuel for motor vehicles - gasoline which contains ethanol. i. Based on the standard enthalpy changes of formation given below, calculate the standard enthalpy changes for the complete combustion of octane and ethanol respectively. Compound AH 29 / kJ molt CH8(1) -250 CH,OH(1) -278 00:(8) -394 H20(1) -286 ii. Assuming that gasoline contains only octane, compare the enthalpy change of combustion values, in kJ/g, of gasoline and an alternative fuel containing gasoline and 10% ethanol by mass. ili. Besides cutting down petroleum consumption, suggest one additional advantage of using the alternative fuel over using gasoline.