Relates to the mixture used to produce a large amount of energy.

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What is the oxidation mechanism of gunpowder?

I've been recently looking into fireworks and the chemistry of explosives, and I found out that amongst others, one of the most important reactions in gunpowder ignition is the oxidation of charcoal ...
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1answer
83 views

Can Fuel Exhaust Be Recycled

When the spark plug of a car ignites the pressurized air/fuel mixture, could you instead send the exhaust to another system within the car to be Recycled? I think it's a great idea that could ...
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1answer
23 views

Can rocket candy explode during the preparation?

I would like to follow the steps in this video: https://www.youtube.com/watch?v=hyPysthIRss After I mixed the Potassium nitrate KNO3 and the ...
2
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0answers
36 views

Is white phosphorus really a cool burning fuel?

About 11 months ago, I posted a question on this SE site on cool flames. One of the answers mentioned white phosphorus. However, a few weeks earlier, I played a game called Spec Ops: The Lines, in ...
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21 views

Thermodynamic-Fuel and efficiency

Why is the maximum theoretical efficiency of Ar engine higher than that of Nitrogen engine? On a molecular level. For an Otto Cycle $\mathrm{Eff} \le\left(1-r^{1-\gamma}\right)$ ...
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17 views

Determination of AFR with Fuel Oil Analysis and given Excess Air

Fuel Oil has the following Analysis: C = 89% H2 = 8% N2 = 2% S = 1% With 3% Excess Air, what is the actual amount of air needed to burn the fuel oil? Answer is 14.17 So I try the Formula for ...
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2answers
37 views

Determining the Equivalence Ratio

Determine the equivalence ratio of the following mixture: 4g of Butane, $\ce{C4H10}$, and 75 grams of air. Answer is 0.82 Ok so I try converting everything into mols $4~\mathrm{g}~(\ce{C4H10}) ...
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2answers
916 views

What are the differences between diesel and unleaded gasoline?

I am curious about the flammability of diesel fuel and its properties, as I don't deal with it on a regular basis (at all). In particular, I want to know how the fuel works when powering a diesel ...
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1answer
88 views

Magnesium air-fuel cell or battery?

I'm a bit confused. I've got this "toy" ... with the help of this site I was abled to find out that the reaction stops with a lack of air. Link to the old question. The battery/fuel cell or however ...
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51 views

Disregarding negative externalities and other barriers, what are some fuels that have a higher power density than gasoline?

Gasoline’s power throughput per kg is $12\,200\:\mathrm{Wh/kg}$ (Wikipedia.org). Are there any other fuels that have a higher power output that are not considered viable solutions as they are ...
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2answers
49 views

Hydrogen Fuel Cell and Battery

For hydrogen fuel cell to produce electricity, hydrogen will need to be supplied to the anode. To split oxygen and hydrogen from water and obtain hydrogen, we need to use electrolysis. To use ...
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15 views

HHO devices for cars (hydrogen enchancement of fuel burning reaction) [duplicate]

Recently I got quite an interesting offer for increasing my fuel economy (which for my 4.0 liter gasoline engine is quite bad as is) which was an HHO device. What it basically is, as I had it ...
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13 views

What would be the products? [duplicate]

So today in chemistry I did a lab by reacting calcium carbide with water to form acetylene gas. I brought a burning splint to the mouth of every test tube and waited until a reaction was complete. One ...
3
votes
1answer
146 views

What is the temperature of heat generated from LPG gas?

I'm working on a project and I require around 300-400 degree Celsius of temperature. As of now I'm taking the normal LPG gas that is available in our house for cooking purposes for my project, but I'm ...
0
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1answer
30 views

How is the octane percentage defined?

Normally octane percentage is mentioned on petrol (95% octane). How is this defined? Is it percentage of chemical or some other parameters?
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1answer
69 views

Why is CO a major species only in fuel-rich combustion?

In fuel-rich combustion, my understanding is that enough fuel reacts and consumes all of the oxygen present. The combustion products $\ce{CO2}$ and $\ce{H2O}$ undergo dissociation until equilibrium is ...
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0answers
82 views

Fuel Cell Chart - Anode, Cathode, Electrolyte

Can someone please check my table to make sure I have the correct information. I am especially unsure of the parts highlighted in yellow:
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2answers
111 views

Are homemade batteries a practical alternative during a blackout?

If your home lost power without warning; are homemade batteries (such as the lemon/potato variety described in this question Are homemade batteries economically practical?) a practical alternative for ...
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3answers
550 views

Are homemade batteries economically practical?

Every kid who has been to a science fair knows that you can make a battery with a lemon, a potato, a penny and a nail. I've never done this and I'm not entirely clear on how it works beyond a hazy ...
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2answers
65 views

Microbial Fuel Cell

Does anyone know of a step by step guide to building a microbial fuel cell? Could someone here on Chem SE possibly provide one? I am looking for something like THIS but for the whole fuel cell and not ...
3
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1answer
114 views

What is this red substance that has accumulated at the bottom of a plastic bottle full of petrol (see picture)?

About two weeks ago I put some ordinary unleaded petrol into a plastic water bottle, as a temporary measure (long story, don't ask!). It has now formed a reddish liquid at the bottom of the bottle. ...
5
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1answer
80 views

How can I reduce Crystallization temperature of seed oil to be used in winter as biodiesel?

How can I reduce Crystallisation temperature of seed oil to be used in winter as biodiesel? The glycerol has been removed from the oil, and white spirit is used to reduce its viscosity.
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1answer
2k views

What are some good research topics for a high school student?

I absolutely love chemistry and I really want to take part in science fairs. I am also taking an AP chemistry class. Cleaner fuel and energy sources and air pollution (especially due to smog and ...
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1answer
62 views

Could this be a feasible fuel system?

First off, please forgive me, I am a chemistry novice! Overall Process Fuel for the system is distilled water Split water into Hydrogen and Oxygen (electrolysis or similar process) Exhaust Oxygen ...
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1answer
118 views

Is there a way to turn cellulose into sugar, at home? (For small scale, DIY alcohol fuel)

I know that once you have sugars, you can ferment, distill, and dehydrate to create 95+% ethanol. I've also read about cellulosic ethanol, with the new step there being the breakdown of the cellulose ...
2
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1answer
110 views

Which is the best rocket fuel?

I searched on internet about rocket fuel and the most common fuel is $\ce{KNO3}$ + sugar (rocket candy), but I think that I could use another fuel methods, like using can with gas or using $\ce{HCl + ...
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3answers
215 views

Open flame combustion in bizzaro world

Humans typically achieve combustion by starting a chemical reaction of a fuel (often a carbon $\ce{C}$ containing fluid like methan $\ce{CH4}$), which is is brought into an an oxidizer ($\ce{O}$ ...
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1answer
339 views

How can diesel fuel produce less carbon monoxide but more carbon particulates?

My guess at why diesel produces more carbon monoxide is that more heat is required for combustion of diesel fuel, so there is therefore less incomplete combustion, so rather than carbon monoxide being ...
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2answers
2k views

Is there a point at which Ethanol (E10) fuel becomes harmful to gas tanks or engines if not used?

This is not the typical chemistry question on this website, but I think it's an important practical question. When I got a gas string trimmer, the woman who worked at the gardening shop told me that ...
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1answer
152 views

How to calculate weight of CO₂ in one kg of fuel

I'm trying to do homework and I have the answers to the problems but I can't read the explanation because it's illegible and I can't find how it's done in my notes. Here's the simplest example: ...
2
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1answer
2k views

Why does the boiling and freezing-point of non-polar molecules rise with increasing molecular mass?

In the section about fuels, my textbook mentions that the boiling and freezing-points of alkanes (which are non-polar) increase with an increase in molecular mass due to London dispersion forces. ...
2
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2answers
210 views

What are the major environmental drawbacks with using methane as a combustable fuel?

What are the biggest environmental issues with using methane, $\ce{CH4}$, (which is found as the major energy source in natural gas, shale gas, biogas, and synthetic natural gas), as a combustible ...
8
votes
1answer
206 views

What are the key chemical characteristics that determine the octane rating of fuel?

The octane rating of petrol (gasoline) is a measure of the how much compression a fuel air mixture can have before detonating (which in petrol engines is a bad thing as you want the mix to combust ...