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Questions and Answers
What is the first step in the separation of air into its constituents?
What is the first step in the separation of air into its constituents?
- Cooling to room temperature
- Liquefaction (correct)
- Fractional distillation
- Compression of air
At what temperature does nitrogen boil?
At what temperature does nitrogen boil?
- -190 °C
- -196 °C (correct)
- -183 °C
- -200 °C
Which gas is collected first during fractional distillation of liquefied air?
Which gas is collected first during fractional distillation of liquefied air?
- Carbon dioxide
- Oxygen
- Argon
- Nitrogen (correct)
What is the boiling point of oxygen?
What is the boiling point of oxygen?
During the separation of air, what process follows liquefaction?
During the separation of air, what process follows liquefaction?
What is the approximate percentage of nitrogen in dry air?
What is the approximate percentage of nitrogen in dry air?
Which gas is essential for combustion and used to support patients with breathing difficulties?
Which gas is essential for combustion and used to support patients with breathing difficulties?
What is the main noble gas found in dry air?
What is the main noble gas found in dry air?
What percentage of dry air is composed of noble gases, primarily argon?
What percentage of dry air is composed of noble gases, primarily argon?
What characteristic makes nitrogen generally considered an inert gas?
What characteristic makes nitrogen generally considered an inert gas?
Flashcards
Liquefaction of air
Liquefaction of air
The process of cooling air to very low temperatures, below -196 °C, the boiling point of nitrogen, to transform it into a liquid state.
Fractional Distillation
Fractional Distillation
A method used to separate different components of liquefied air based on their boiling points. Warming the mixture causes components with lower boiling points to vaporize and be collected first.
Air Separation
Air Separation
The process of separating liquefied air into its components like nitrogen, oxygen, and argon through a fractional distillation column.
Boiling Point
Boiling Point
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Nitrogen's boiling point
Nitrogen's boiling point
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What is the main composition of air?
What is the main composition of air?
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What is the most abundant gas in air?
What is the most abundant gas in air?
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What gas is critical for breathing and burning?
What gas is critical for breathing and burning?
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What is the main noble gas in air?
What is the main noble gas in air?
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What is the main greenhouse gas in air?
What is the main greenhouse gas in air?
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Study Notes
Air Separation
- Air is separated into its constituents via a two-step process.
- Liquefaction: Air is cooled to very low temperatures.
- Fractional distillation: Liquefied air is placed in a chamber attached to a fractionating column. Nitrogen has the lowest boiling point and is the first to boil off, hence it is collected at the bottom.
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