2. The vapor pressure of propane is 107.7 psi at a temperature of 60°F, 67.7 psi
ID: 1010508 • Letter: 2
Question
2. The vapor pressure of propane is 107.7 psi at a temperature of 60°F, 67.7 psi at 30°F, and about 14.7 psi at a temperature of -44°F.
At about what temperature does propane boil at?
Why does propane in a gas grill tank stay a liquid even though it is at a temperature higher than the boiling point of propane?
2. The vapor pressure of propane is 107.7 psi at a temperature of 60°F, 67.7 psi at 30°F, and about 14.7 psi at a temperature of -44°F.
At about what temperature does propane boil at?
Why does propane in a gas grill tank stay a liquid even though it is at a temperature higher than the boiling point of propane?
Why won’t a gas grill work at extremely low temperatures?
Explanation / Answer
Since boiling point is the temperature at which the vapor pressure equals 14.7 Psi (1atm), so its boiling point is – 44deg.F
the propane is stored under pressure in a gas grill. Higher the pressure, higer the boiling point and hence when a liquid is under pressure its boiling point increases and does not boil.
The vapor pressure of propane drops with temperature and there is a possibility of solidification of propane leading to blockage leading the gas to be more sensitive to pressure.
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