a) CzHz or acetylene is a colorless, flammable gas with an odor similar to garlic. Acetylene is a synthetic gas produced

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A Czhz Or Acetylene Is A Colorless Flammable Gas With An Odor Similar To Garlic Acetylene Is A Synthetic Gas Produced 1 (83.87 KiB) Viewed 101 times

a) CzHz or acetylene is a colorless, flammable gas with an odor similar to garlic. Acetylene is a synthetic gas produced from the reaction of calcium carbide, Cacz, with water. Given the following thermochemical equations, CaO) +H,O) –Ca(OH) AH° = -65.3 kg CaOk) + 3C) – CaC26) + COg) AH = +462.3 kJ CaCONG) CaO6) + CO2(g) AH® = +178 kg CaC0) + 2H,0(1) —Ca(OH)() + CH2(g) AH = -126 kJ 2C6) + O2(g) CO2(g) ΔΗ° =-220 kJ 2H,0(1) 2H2(g) + O2(8) AH° = +572 kJ 2C(s) + H2(g) → CH2() Calculate the value of AH - for acetylene in units of kilojoules per mole! b) Gasohol was defined as a blend of gasoline with at least 10% alcohol by volume, excluding alcohol made from petroleum, natural gas, or coal. For this reason, all ethanol to be blended into gasoline is produced from renewable biomass feedstocks. Gasoline was mixed with C,H,OH or ethanol (density ethanol: 0.787 g/mL; Mr ethanol: 46.07 g/mol) to form gasohol, AH®, C,H,OH= -277.63 kJ/mol, AHH,O= -285.8 kJ/mol, AH, CO2= -393.5 kJ/mol, AH, Oz= 0 kJ/mol CH3OH(l) + 302(8) ► 2C02(8) + 3H2O(1) Calculate the number of kilojoules released when 1 gallon (US liquid gallon) of ethanol is burned completely!