Calculate the HHV and LHV of gaseous n-octane fuel (C8H18)
Liquid octane (C8H18), a component of gasoline, reacts with gaseous oxygen to form gaseous carbon dioxide and water vapor. Write the balanced chemical reaction for this process. Express your answer as a chemical equation including phases.
The combustion of liquid octane, C8H18, in the presence of gaseous oxygen yields carbon dioxide and liquid water. Write the balanced equation for the reaction, including physical states.
Calculate the heat (in kJ) required to completely vaporize 11.42 g of n-octane, C8H18, if the sample is initially at –20 ºC. Pertinent data are: m.p. = -57 ºC, b.p. = 126 ºC, ΔHfus = 20.65 kJ/mol, ΔHvap = 38.6 kJ/mol, Cp(liq.) = 254 J/K-mol.
ii. Calculate LHV (lower heating value) ΔHc for octane and ethanol. Compare these values to those tabulated for methane, ethanol and octane on a mass basis. Q: What does Heat of Combustion indicate about fuels? Q: Compare the heat of combustion for the two fuels and comment about any significance relative to operation of an aircraft?
19.16 The normal freezing point of n-octane (C8H18) is -57 degree C. (a) Is the freezing of n-octane an endothermic or exothermic process? (b) In what temperature range is the freezing of n-octane a spontaneous process? (c) In what temperature range is it a nonspontaneous process? (d) Is there any temperature at which liquid n-octane and solid n-octane are in equilibrium? Explain.
Calculate the percent yield for the complete combustion of 1.00 L of Octane, C8H18, if the actual yield of carbon dioxide is 1.90 X 10^3 grams and the density of Octane is 0.700g/ml. 2C8H18 + 25O2 ------- 16CO2 + 18 H2O
Liquid octane (C8H18) is burned completely during the combustion process and exit at a pressure of 4 atm. Determine; a. The air-fuel ratio b- The dew point temperature of the products.
A major component of gasoline is octane C8H18. When liquid octane is burned in air it reacts with oxygen O2 gas to produce carbon dioxide gas and water vapor. Calculate the moles of octane needed to produce 0.085mol of water. Be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits
The fuel for your car is a mixture of octane and several other hydrocarbons. What mass of CO2 will be produced when 125 g of C8H18 react completely in the following equation? 2 C8H18 + 25 O2 → 16 CO2 + 18 H2O
The combustion of octane (C8H18) in oxygen proceeds as follows 2 C8H18(g) + 25 O2(g) ---> 16 CO2 (g) + 18 H2O(l) How many moles of CO2are produced when 5.0 moles of octane, C8H18, is burned in 5.0 moles of oxygen?