Acetylene torch

Acetylenes contain at least one triple bond. The triple bond is even more reactive than a double bond and, therefore, acetylene is used industrially to make other compounds used in rubber and plastics. Acetylene burns in oxygen to produce a very hot flame used for welding and metal cutting (oxy-acetylene torch). 

In other oxygen applications, metal fabrication involves cutting and welding with an oxygen-acetylene torch. Chemical manufacture use includes the formation of ethylene oxide, acrylic acid, propylene oxide, and vinyl acetate. Miscellaneous uses include sewage treatment, aeration, pulp and paper bleaching, and missile fuel. 

Alkynes are hydrocarbons in which there is at least one triple bond. Acetylene is an alkyne that you have likely heard of, as in an acetylene torch. Its formula is... 

The alkyne series of hydrocarbons is characterized by having molecules with one triple bond each. They have the general formula C H2 2 and the name ending -yne. Like other unsaturated hydrocarbons, the alkynes are quite reactive. Ethyne is commonly known as acetylene. It is the most important member of the series commercially, being widely used as a fuel in acetylene torches and also as a raw material in the manufacture of synthetic rubber and other industrial chemicals. 

Acetylene is a colorless gas, with a characteristic garlic-like odor. It is liable to explode when compressed in the pure state, and is usually kept in solution under pressure in acetone. It is used as a fuel, in the oxy-acetylene torch and the acetylene lamp. 

Volume Two of PMA will continue to feature weapons articles similar to those that appeared in Volume One. The major difference in projects for this volume will be the assumption that the reader has access to welding equipment and facilities for melting aluminum.A standard oxy-acetylene torch will be sufficient for both of the a-bove. 

Ethyne, commonly called acetylene, is one of the very few alkynes that are of practical importance. This welder is using an acetylene torch. 

Ivhcsn soldering, follow directions on the Flux container and properly apply flux to scar, place Scar Stud on flux and then solder using a good propane or acetylene torch. 

When a welder uses an acetylene torch, the combustion of acetylene liberates the intense heat needed for welding metals together. The equation for this combustion reaction is... 

When welding is done with an acetylene torch, acetylene combines with oxygen to form carbon dioxide and water. This combustion reaction is exothermic, and enough energy is released to melt metal. 

Combustion reactions occur rapidly and frequently with visible flames. The combustion of acetylene gas, C2H2(g), in an acetylene torch produces a great deal of heat per mole of acetylene, which makes it an excellent fuel for reaching the high temperatures needed to cut sheets of iron. 

When it burns in oxygen, a great deal of heat is generated - oxy-acetylene torches are used for cutting and welding metals ... 

The reaction shown above is the combustion reaction of acetylene. This reaction is made use of in welding, commonly called the acetylene torch. Tremendous amount of heat is liberated as a result of this reaction and is used for welding purposes. As you can see from the equation, the number of moles of the reactants is greater than the number of moles of the products. Thus, as the reaction proceeds, there is a decrease in the number of moles of gas. If you predicted a decrease in entropy, your answer is correct. 

Comment on the stability characteristics of the operating conditions you identify for each reactor. Can you relate your comments to something you may have observed in a chemistry laboratory or when watching a welder operate an acetylene torch ... 

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