Question

In: Chemistry

200. g of liquid phase octane (C8H18) are burned in air at a temperature of 100....

200. g of liquid phase octane (C8H18) are burned in air at a temperature of 100. degrees Celsius and a pressure of 1.00 atm, forming vapor phase water and carbon dioxide.

a) Write the balanced chemical reaction equation for this process.

b) What is the magnitude of the difference between ΔE and ΔH for one mole of octane going through this process? (Hint: use the value of R that makes life easiest.)

c) The reaction is in contact with a reservoir of water that is also at 100 degrees Celsius. If that reservoir absorbs all of the heat released by the reaction (of the 200. g of octane), how many moles of the water will evaporate? Each mole of C8H18 releases 5074.482 kJ of heat when it goes through this process.

Part a I got no problem, but I can't seem to figure out parts b and c. Thanks for the help!!

Solutions

Expert Solution


Related Solutions

Determine the adiabatic flame temperature when liquid octane, C8H18 at 25C is burned with 300% theoretical...
Determine the adiabatic flame temperature when liquid octane, C8H18 at 25C is burned with 300% theoretical air at 25C in a steady flow process.
A 1.800 g sample of octane, C8H18, was burned in a bomb calorimeter whose total heat...
A 1.800 g sample of octane, C8H18, was burned in a bomb calorimeter whose total heat capacity is 11.66 kJ/°C. The temperature of the calorimeter plus contents increased from 21.59°C to 29.44°C. What is the heat of combustion per gram of octane? What is the heat of combustion per mole of octane? In a bomb calorimeter (where pressure is NOT constant) what is the heat of reaction equal to?
The vapor pressure of liquid octane, C8H18, is 100. mm Hg at 339 K. A sample...
The vapor pressure of liquid octane, C8H18, is 100. mm Hg at 339 K. A sample of C8H18 is placed in a closed, evacuated 552 mL container at a temperature of 339 K. It is found that all of the C8H18 is in the vapor phase and that the pressure is 68.0 mm Hg. If the volume of the container is reduced to 350 mL at constant temperature, which of the following statements are correct? Choose all that apply. A)...
Octane, C8H18, a primary constituent of gasoline, burns in air: C8H18(ℓ) + 12 1/2 O2(g) →...
Octane, C8H18, a primary constituent of gasoline, burns in air: C8H18(ℓ) + 12 1/2 O2(g) → 8 CO2(g) + 9 H2O(ℓ) A 1.00-g sample of octane is burned in a constant volume calorimeter. The calorimeter is in an insulated container with 1.20 kg of water. The temperature of the water and the bomb rises from 25.00 °C (298.15 K) to 33.21 °C (306.36 K). The heat required to raise the bomb’s temperature (its heat capacity), Cbomb, is 837 J/K. The...
The combustion of liquid octane, C8H18, in the presence of gaseous oxygen yields carbon dioxide and...
The combustion of liquid octane, C8H18, in the presence of gaseous oxygen yields carbon dioxide and liquid water. 2C​8H18(l)+25O2(g)-------------->16CO2(g)+18H2​O(l) How many grams of water are produced by the reaction of 17.0 g of octane?(fill in the blank) _________ g H2​O
INTERACTIVE EXAMPLE Constant Volume Calorimetry Octane, C8H18, a primary constituent of gasoline, burns in air: C8H18(ℓ)...
INTERACTIVE EXAMPLE Constant Volume Calorimetry Octane, C8H18, a primary constituent of gasoline, burns in air: C8H18(ℓ) + 12 1/2 O2(g) → 8 CO2(g) + 9 H2O(ℓ) A 1.00-g sample of octane is burned in a constant volume calorimeter. The calorimeter is in an insulated container with 1.20 kg of water. The temperature of the water and the bomb rises from 25.00 °C (298.15 K) to 33.21 °C (306.36 K). The heat required to raise the bomb’s temperature (its heat capacity),...
A liquid octane (C8H18) enters a combustion chamber of a gas turbine stationary at 1 atm...
A liquid octane (C8H18) enters a combustion chamber of a gas turbine stationary at 1 atm and 25 °C, and burns with 300% of excess air that enters the chamber in the same state. Determine the heat of combustion if the products come out at 226.85 °C (kJ/kg) Determine adiabatic flame temperature (°C)
One kmol of gaseous octane (C8H18) is ignited with stoichiometric amount of dry air in a...
One kmol of gaseous octane (C8H18) is ignited with stoichiometric amount of dry air in a closed, rigid vessel. The pressure of the reactants is 1 atm and the temperature is 25C; while the temperature of the products is 727C. Assume “complete” combustion. (a) Calculate the pressure (atm) of the products. (b) Determine the heat transfer (kJ/kg fuel) during the reaction. Answer: (a) 3.42 atm
A solution contains 43.0 g of heptane (C7H16) and 46.0 g of octane (C8H18) at 25...
A solution contains 43.0 g of heptane (C7H16) and 46.0 g of octane (C8H18) at 25 ∘C. The vapor pressures of pure heptane and pure octane at 25 ∘C are 45.8 torr and 10.9 torr, respectively. Assuming ideal behavior, calculate each of the following. The vapor pressure of heptane in the mixture. The vapor pressure of octane in the mixture. The total pressure above the solution. What is the concentration of heptane in mass percent? What is the concentration of...
Consider four possible liquid fuels used in vehicles. • C8H18 Octane - gasoline • C12H26 Dodecane...
Consider four possible liquid fuels used in vehicles. • C8H18 Octane - gasoline • C12H26 Dodecane - diesel • CH3OH ethanol - gasoline additive • CH3NO2 nitromethane - racing fuel Determine the heat released upon combustion with O2 for 15 gallons of each fuel. Hint: Perform the following. 1. Balance the combustion reaction for each fuel. The products are CO2(g), H2O(g); for nitromethane, N produces N2(g) as one of the products. 2. Determine the enthalpy of each combustion reaction. 3....
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT