At a barometric pressure of 760 mm Hg, 95% by volume of LPG evaporates at a temperature of __________ °C?
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Answer: A. 2
Explanation
Liquefied petroleum gas consists primarily of propane and butane mixtures formulated to vaporize easily at low ambient temperatures. At standard barometric pressure, a typical commercial LPG blend achieves ninety-five percent evaporation near two degrees Celsius. This low boiling point ensures reliable fuel vaporization during cold weather conditions for various consumer applications. Liquefied petroleum gas is stored as a pressurized liquid inside steel tanks and vaporizes into gas upon release. Vaporization behavior depends directly on the precise hydrocarbon composition ratio of propane and butane in the blend. Barometric pressure influences the boiling point of volatile liquids according to standard phase equilibrium thermodynamics.
Option B represents negative forty degrees Celsius, which is the pure boiling point of propane rather than a 95% LPG blend point. Option C is thirty degrees Celsius, a temperature far too high for standard winter LPG vaporization specifications. Option D specifies fifty-five degrees Celsius, which exceeds normal ambient evaporation ranges for standard commercial fuel blends.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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