Combustion Definition and 348 Threads

for eg. combustion of CH4: CH4(g) + 2O2(g) ---> CO2(g) + 2H2O(l) enthalpy of combustion: (-393.51) + 2(-241.82) - (-74.81) = -802.34 kj/mol energy output per unit mass: 802.34 x 1000/16(molar mass) = -50146.25 kj/kg energy output per unit volume: -50146.25 x 0.645(mass density) =...

Homework Statement Calculate the heat of combustion for C2H6 from the following information: C2H4+ 3O2----> 2 CO2 + 2 H2O (-1409.5kJ) C2H4 + H2 ----> C2H2 (-136.7 KJ) H2 + 1/2 O2 -----> H2O ( -285.5 kJ) The Attempt at a Solution C2H6 --> C2H4 + H2 +136.7kJ C2H4 + 302...

As most of you are probably aware, A 'new' gas is being studied to be burned in gas turbine (DLE) combustors. Syngas which is a mixture of CO and H2. I am currently involved with experiments investigating the burning characteristics of this gas. However, we premix our gas in a stainless steel...

You burn 103.4 mg of phenol in a calorimeter of heat capacity 1,483 J K-1 and the temperature rises by 1.83 oC. Determine the molar heat of combustion for phenol in kJ mol-1. The molar mass of phenol is 94.12 g mol-1 Ccal=deltaH/ deltaT This is what I did. n=.1034/94.12 =1.09859E-3mol...

Hey what if you had a certain volume of hydrogen gas in two different scenarios. They are of equal amounts. In one scenario, the hydrogen is ignited so that it explodes instantaneously. In the other scenario, the (equal amount of) hydrogen is used in a thrust engine for an extended period of...

Hi again, I was doing some experiments on heat of combustion of various fuels and determine which fuel is better by creating a calorimeter. And its simple and straight forward but i started thinking what happens to the water created by burning the fuel, as an example i was doing methanol and...

Hi everyone, We have an argument about gasoline combustion engine and diesel engine. Some say, the diesel engine is stronger than gasoline one. My idea is if the two engines are the same dimension, they must have the same power. Am I right or wrong. Thanks

hello everybody here in that great,full&useful forum, well--im a student in the final year of mechanical engineering,and i was really interested in the whole courses we had taken at school related to the subject of comustion,and i know abit about the techniques of the electronic boeards and...

Acetylene (C2H2) is burned with a stoichiometric amount of air during a combustion procss. Assuming complete combustion, determine the air-fiel ratio on a mass and mole basis. I'm not asking for help on the actual question I just don't know what the basic chemical equation is? C2H2 +...

What I am getting at is I would like to find out the psi of some engines. Is there a formula(s) to get good estimates or exactness of the pressure made in a cylinder. For example, you would need the cubic inch, static compression, cam specs, etc...and at a given position of the piston get...

Homework Statement Does combustion reactions always result in water and carbon dioxide being formed, can it just have water or just carbon dioxide, or does water and carbon dioxide not need to be products. Furthermore would Iron(II)oxide(s) + oxygen(g)--> iron(III)oxide(s) be considered a...

i recently heard that ups is designing and testing a hydraulic system to power a torque converter for an efficient delivery system i need to know the validity of the situation and the plausibility of it being run by an electrically powered motor.

Does anybody has any comment on this? What might cause it? B/c I don't want to explode. lol

I am needing help on some homework questions: A 2.200 g sample of quinone, C6H4O2, is burned in a bomb calorimeter whose total heat capacity is 7.854 kJ/ degrees C. The temperature of the calorimeter increases from 23.50 degrees C to 30.63 degrees C. 1. What is the HEAT OF COMBUSTION PER...

What I have to do is find out which fuel would be best to use as an automotive fuel. My choices are methanol ethanol and propanol. My guess so far is propanol because it has a molar enthalpy of combustion of 2021kJ/mol which is close to double ethanol (1367kJ/mol) but it needs much more...

hey guys , i am studying about the old combustion chambers. i came across the L head combustion chamber and am confused about the exact position of the spark plug.so please help me out of this.

Hello, I have been assigned to do an information search on the Combustion Engine. I have to find 5-10 articles detailing how combustion engines incorporate physics principles. I have looked around for articles but haven't found much. What principles are incorporated in the combustion engine...

Hey, I have to know how I am going to do this by tomorrow...I have to find out some way to measure the heat energy given off by the combustion of various batches of biodiesel that I have made for Physics/Chemistry. I can't just light the fuel, because it would explode and I wouldn't be able...

Hey guys ,can u just let me know about the most advanced or developed IC engine.Plz help.

1) A combustion cylinder (containing a fixed number of moles of gas initially at 9.00atm ) with a moveable piston is maintained at a constant temperature changes volume from 2.00 L to 6.0 L. Determine the change in pressure during this action. P1 = 9.00 atm V1 = 2.00 L P2 = ? V2 = 6.0 L...

This may be the wrong forum, so mods please move if necessary (and forgive my error :) ). I was trying to research combustion temperatures (for a typical four stroke engine) as they relate to air/fuel ratio (AFR). I have googled my butt off, and I read many interesting things. But, I still...

In an SI engine, according to the book Internal Combustion Engine Fundamentals, knocking is produced due to the interaction of the shock wave and the expansion wave which together produce very high amplitude standing waves. My question is, in knocking is there only one shock wave or multiple...

"SYDNEY (Reuters) - An Australian man built up a 40,000-volt charge of static electricity in his clothes as he walked, leaving a trail of scorched carpet and molten plastic and forcing firefighters to evacuate a building." http://news.yahoo.com/s/nm/australia_electricity_dc

Has enyone (in the realm of fiction even) proposed making an enourmous piston engine that would use nuclear weapons instead of atomized hydrocarbons? (Sure, it would have to be BIG. But its possible, no?)

Determine the heat of combustion of methane (CH4(g)) by writing a balanced equation and using the bond energies indicated below. C--H = 414 KJ/mol O==O = 502 KJ/mol C==O = 799 KJ/mol O--H = 464 KJ/mol ________________ I've googled it and apparently the answer is -890 KJ/mol but when...

Hi guys can you please check if this is right...thanks in advance The heat released by the reaction 2C + 2H2 = CH4 is 74.8kJ/mol. Using this information and a table of standard enthalpy of formation values, determine the heat of combustion for the burning of methane to form CO2 and H2O(g)...

I had an interesting situation at work. One of the Faculty has a very large plastic planter filled with store bought soil. It has appearantly been sitting outdoors unused for quite some time and has become incredibly dried out with some dry dead plant material still mixed in. Yesterday there...

The complete combustion of RDX is 2C3H6N6O6 + 302 --> 6H2O + 6CO2 + 6N2. How much heat is liberated from the complete combustion of 10g of RDX? delta H values: H20 = -286, CO2 = -394, RDX = +65 (all in kJ/mol) I thought it'll be (6*-286 + 6*-394) - (2*65) = -4210 kJ/mol Then divide...

Is there away tio reduce the smoke produced in a [combustion] reaction? Theoretically, there is no smoke produced at all (only water and carbon dioxide), but because of the impurities, imcomplete combustion, moisture, obviously, smoke is a common product of burning something. How can I...

This is a pretty cool site... I decided to register and ask my very first question... I am developing an Excel Spreadsheet tool for learning purposes which demonstrates effects on power generation of automobile engines by changing various specifications like charge temperature, rpm, bore...

Calculate the heat of combustion for C2H6 from the following information: C2H4 + 3 CO2 --> 2 CO2 + 2 H2O /\H f -1409.5 kJ C2H4 + H2 --> C2H2 /\H f - 136.7 kJ H2 + 1/2 O2 --> H2O /\H f - 285.5 kJ i saw someone else ask this question and they were referred to look at...

What is spontaneous combudtion? does it kill? And, what does it look like?

Hello I am trying to solve this question and have been stumped for quite a while. Can some tell me the steps I have to take in order to solve this. Question Calculate the heat of combustion for C2H6 from the following information: C2H4+ 3O2----> 2 CO2 + 2 H2O -1409.5kJ C2H4...

A 0.196 g sample of quinone (C6H4O2) is burned in a bomb calorimeter that has a heat capacity of 1.56 kJ/C. What is the heat of combustion (kJ/mol) if the temperature increases by 3.2 C? -I have no idea how to do this problem...

My friend and I are stuck on a lab-work, where we are to find the enthalpy of combustion for stearic acid. Does anyone know the reaction formula for the combustion of stearic acid?

I was reading an article and they were talken about this new hydrogen hummer that will be powered by hydrogen. But it was a hydrogen combustion engine instead of a hydrogen electric vehicle. How does the combustion engine work? I thought hydrogen doesn't have that really quick explosive...

What volume of O2 (m3) is needed for the complete combustion of 152 g of C2H6 at 19.0oC and 100.0 kPa ?

I simply want to check that these equations are balanced correctly: 2CH_3OH_{(g)} + 3O_2_{(g)} \rightarrow 2CO_2_{(g)} + 4H_2O_{(l)} CH_3CH_2OH_{(g)} + 3O_2_{(g)} \rightarrow 2CO_2_{(g)} + 3H_2O_{(l)} 2CH_3CH(OH)CH_3_{(g)} + 9O_2_{(g)} \rightarrow 6CO_2_{(g)} + 8H_2O_{(l)}...

Hey this is a weird subject but have any of you ever thought about what causes it, if it is indeed real? I have a theory but it may be totally wrong as I don't have a background in physics or chemistry. Well I read about solar neutrinos and how they pass through our bodies all the time. They...

Hello, how would i solve the following?: "How many litres of air (78% N2, 22% O2 by volume) are needed for the combustion of 1 litre of octane, C8H18, a typical gasoline component, of density 0.70g/mL?" Note - 1 mole of oxygen gas is equal to 24.5 litres. I have done the chemical...

I placed some magnesium ribbon in HCl and measured the temperature change. How would i find the change in enthalpy per mole of magnesium in the following reaction: Mg + 2HCl --> H2 +MgCl2 If i know the following information: change in temperature = 19C...

Hey, I need some help with the following question: A sample of 0.1964g of Quinone (C6 H4 02, Relative Molar Mass = 108.1) was burned in a bomb calorimeter that heas a heat capacity of 1.56 kJ/M. The temperature in the caolorimeter rose from 19.3 to 22.5 degrees celcius. (a) write a...

Hi, I know this is a chemistry question but I was hoping there'd be a kind soul with a chemistry background whose willing to help! The space research group I work for has 2 satellites which have hydrazine (N2H4) monopropellant thrusters. From what I understand the pressurized hydrazine is...

Ok. Let's suppose the next imaginary experiment. I encouragely promise that I don't know anything about nowadays supersonic combustion problems. I want to continue with the discussion spread in the "rocket thrust" thread, and what Enigma and Russ Waters said. There is a supersonic flow at the...

Hello, I know I should have knowledge of this, but I can't seem to remember very well what happens in combustion reactions with a very short supply, limited supply, and abundant supply of oxygen. What is the difference? I know complete combustion hands down, but what happens in a problem such...

Hi. Let's suppose you have to drive 100 km, you would be wasting more gas by: a)driving at a slower speed b)driving at a faster speed . Someone who adores cars told me that when you press on the accelerator all you're really doing is allowing more air into the combustion...

Will you please help me... It is required to determine the molal analysis of the products of combustion when C8 H18 is burned with 200% theoretical air, and determine the dew point (saturation temperature corresponding to the partial pressure of water present in this equation) of the products...

Enthalpyof Combustion of 1 molar volume of H2(g) divided by Enthalpyof Combustion of 1 molar volume of CH4(g) = Enthalpyof Combustion per mole of H2 divided by Enthalpy of Combustion per mole of CH4 why?