combustion

  1. R

    Constant volume combustion

    I am in the process of designing a new engine and would like to get a ball park estimate of the combustion process before building the first prototype. One of the design features of the engine is true constant volume combustion. From the limited research I have performed, it seems most assume...
  2. M

    Calculating Mole Masses, Combustion

    Hello I am stuck with these 5 homework problem that I am unable to solve or set it up, can anyone help me how to get the answer to these? 1) Calculate the number of grams and pounds of CO2 that result from the combustion of 1 gallon of gasoline (we will assume that gasoline is mostly octane...
  3. T

    How to find H in kJ in complete combustion of 1 mol of butane?

    Hi guys! Please help, my exam is coming up and I am so confused by this question. Question: Butane has H of -2871 kJ/mol when it undergoes complete combustion into carbon dioxide and liquid water. Given the following Hf values: *Carbon dioxide: -393.5kj/mol *Oxygen gas: 0 kj/mol *Liquid...
  4. H

    Complete combustion of natural gas in air

    Hello, I am stuck on how to write the balanced equation for chemically correct combustion of natural gas in air. The natural gas I'm using is 90% CH4, 5%C2H6, and 5%CO2. Air is assumed to be 21% oxygen and 79% nitrogen. I assume the products are just CO2, H2O, and N2, but I'm having a hell of...
  5. Q

    Using Bond Dissociation Energies to Approximate Heat of Combustion for Pentane

    First. I am meant to have a table of bond dissociation values in my book, but we use a different edition so these are not available to me. Second. How do I know how to set up the formula once I have the values? Do I draw a structural diagram to show the bonds? Thank you. Once I know how to...
  6. Y

    stoichiometry partially premixed combustion

    Hello everyone, I have a question about stoichiometry. I haven't studied chemistry so it's really confusing for me. I'm working on a CFD case of premixed-combustion with EBU model. I need to calculate the stoichiometry field and the stoichiometry in inlet, but since I've 3 inlets, I don't know...
  7. D

    Combustion and Heat of Formation

    Hi, my AP Chemistry class is learning how to calculate the heat of formation and bond energies. I'm stuck on part 2 of this problem: :confused: Consider the combustion of ethane: C2H6(g) + 7/2O2(g) -> 2CO2(g)+3H2O(l) change in heat at standard conditions = -1559 KJ/mol I used Hess' law to...
  8. B

    Calculate energy of combustion

    I've been given a lab where we create biodiesel from olive oil and methanol. We then use a calorimeter to test the olive oil, the methanol and the biodiesel. Here are the results from my lab: The mass of water used in the calorimeter is 30 g. I am then asked to calculate the energy of...