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Chemistry: Hydrocarbons in Fuels

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Questions and Answers

What is the general trend in physical state as the number of carbon atoms in hydrocarbons increases?

Gases to liquids to solids

How are hydrocarbons classified based on the number of carbon atoms they contain?

Gases, liquids, and solids

What is the typical physical state of a hydrocarbon with 10 carbon atoms?

Liquid

At what carbon atom count do hydrocarbons typically transition from gases to liquids?

5 Signup and view all the answers

What physical state are hydrocarbons with 25 carbon atoms most likely to be?

Solid Signup and view all the answers

What is the purpose of cryogenic processes in the natural gas industry?

To separate out lighter hydrocarbons such as ethane, propane, and butane from an incoming stream. Signup and view all the answers

How are refrigerants utilized in cryogenic processes?

Refrigerants are used to cool the gas stream to very low temperatures. Signup and view all the answers

What happens to the gas stream when it enters the expansion chamber in a cryogenic process?

Its vapor pressure drops. Signup and view all the answers

What is the purpose of NGL stabilization in the natural gas industry?

To meet market specifications for transport methods. Signup and view all the answers

How is ethane typically used in the petrochemical industry?

As a feedstock to produce ethylene and petrochemical building blocks. Signup and view all the answers

What is the primary use of propane in addition to being a petrochemical feedstock?

As a heating and transportation fuel. Signup and view all the answers

What is normal butane commonly used for in the natural gas industry?

As a refining blend stock for gasoline and a petrochemical feedstock. Signup and view all the answers

How is isobutane utilized in the refining industry?

As a feedstock for alkylation, MTBE, TAME manufacturing, and a component in gasoline octane blends. Signup and view all the answers

What does natural gasoline refer to in the context of the gas stream?

Pentanes and heavier components. Signup and view all the answers

What key role does methane play in cryogenic processes?

Methane stays in the stream due to its light weight. Signup and view all the answers