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Fuel Heat of Combustion kJ/mol Ethanol 1367 Ethane 1560

Fuel Heat of Combustion kJ/mol Ethanol 1367 Ethane 1560 Q1) What is the heat of combustion of ethanol in kJ/g? 1 mol of ethanol = 46.068g Therefore 1g of ethanol will give 1/ 46.068 lots of the molar heat 1g gives (1 / 46.068) * 1367 kJ = 29.67 kJ (4sf).

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Fuel Heat of Combustion kJ/mol Ethanol 1367 Ethane 1560

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  1. FuelHeat of Combustion kJ/mol • Ethanol 1367 • Ethane 1560 • Q1) What is the heat of combustion of ethanol in kJ/g? • 1 mol of ethanol = 46.068g • Therefore 1g of ethanol will give 1/ 46.068 lots of the molar heat • 1g gives (1 / 46.068) * 1367 kJ = 29.67 kJ (4sf)

  2. FuelHeat of Combustion kJ/mol • Ethanol 1367 • Ethane 1560 • Q2) What is the heat of combustion of ethane in kJ/g? • 1 mol of ethane = 30.068g • Therefore 1g of ethanol will give 1/ 30.068 lots of the molar heat • 1g gives (1 / 30.068) * 1367 kJ = 45.46 kJ (4sf)

  3. FuelHeat of Combustion kJ/mol • Ethanol 1367 • Ethane 1560 • Q3) Ethanol has a density of 790 g/L. What is the energy content of 1L of ethanol? • From the first question: 1 g of ethanol gives 29.67 kJ. • There are 790g in 1L. • So there is 790 * 29.67kJ in 1L • 23439kJ • 23400 kJ (3sf) in 1 L

  4. FuelHeat of Combustion kJ/mol • Ethanol 1367 • Ethane 1560 • Q4) Ethane has a density of 700g/L. What is the energy content of 1L of ethane? • From the first question: 1 g of ethanol gives 45.46 kJ. • There are 700g in 1L. • So there is 700 * 45.46kJ in 1L • 31822kJ • 31800 kJ (3sf) in 1 L

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