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Chapter 9-4 - Commercial Importance of Alkynes
Organic Chemistry 307: Chapter 9 - Alkynes; Section 4 - Commercial Importance of Alkynes
12
Organic Chemistry
Undergraduate 3
11/14/2011

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Term
__________ is by far the most important commercial alkyne.
Definition
1) Acetylene
Term
__________ is an important industrial feedstock, but its largest use is as the fuel for the oxyacetylene welding torch.
Definition
1) Acetylene
Term
Acetylene is a __________, foul-smelling gas that burns in air with a __________, sooty flame which can be turned to __________ if supplied with pure oxygen.
Definition
1) Colorless
2) Yellow
3) Blue
Term
__________ produces the most heat per mole of gas consumed.
Definition
1) Ethane
Term
The increase in __________ of the products is proportional to the heat given off per mole of __________ formed.
This rise in temperature is largest in __________, which gives off the most heat per mole of products.
Definition
1) Temperature
2) Products
3) Acetylene
Term
__________ gives off the greatest amount of heat per mole of products, with temperatures reaching 2800 degrees Celsius.
Definition
1) Acetylene
Term
__________ is thermodynamically unstable.
Definition
1) Acetylene
Term
When acetylene is subject to __________ or __________ shock, it decomposes to its elements, releasing __________ of energy per mole.
Definition
1) Thermal
2) Mechanical
3) 234kJ
Term
Acetylene dissolves freely in __________, and the dissolved gas is not so prone to decomposition.
Definition
1) Acetone
Term
__________ is also used in welding torches and does not decompose as easily as acetylene, burning better in air (as opposed to pure __________).
Definition
1) Methylacetylene
2) Oxygen
Term
Acetylene, one of the cheapest organic chemicals, is made form __________ or __________ __________.
The synthesis from coal involve heating __________ and __________ (roasted coal) in an electric furnace to produce __________ __________.
The addition of __________ to calcium carbide produces acetylene and hydrated lime.
Definition
1) Coal
2) Natural gas
3) Lime
4) Coke
5) Calcium carbide
6) Water
Term
The synthesis of acetylene from __________ __________ is a simple process.
Natural gas consists mostly of __________, which forms __________ when it is heated for a very short period of time.
Although the reaction is __________, there are twice as many moles of (reactants/products) as (reactants/products).
The increase in the number of moles results in an increase in __________.
Definition
1) Natural gas
2) Methane
3) Acetylene
4) Endothermic
5) Products
6) Reactants
7) Entropy
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