Determine the Low Heating Value (LHV) and High Heating Value (HHV) of Ethanol (C2H5OH) in units of kJ/kg if the standard forming enthalpies ( hf,298 K) liquid H2O, vapor H2O, and CO2 are known to be respectively equal to -285.820 kJ/mol, -241.826, kJ/mol, and -393.5 kJ/mol.

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QUESTION 2 3.8 moles of an ideal gas at 27.0°C expands isothermally from an initial volume of 20.0 dm³ to a final volume of 83.1 dm³. Calculate w (unit is J) for this process for expansion against a constant external pressure of 3.1 bar. Please write your answer in scientific E notation with 3 significant figures. If your answer is negative, please add negative sign. For example: -2.32E2. Do not write unit (J).

Vapor pressure data are given here for octane, C8H18. Temperature(c) Vapor Pressure (mm Hg) 25 13.6 50 45.3 75 127.2 100 310.8 Use the Clausius–Clapeyron equation to calculate the molar enthalpy of vaporization of octane and its normal boiling point