High School

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A storage cylinder of recovered R-22 at normal room temperature (about 75°F), in the absence of non-condensables, will be pressurized to:

A) 250 psig
B) 200 psig
C) 175 psig
D) 130 psig

Answer :

Final answer:

A storage cylinder of recovered R-22 at room temperature will be pressurized to around 175 psig. Therefore, the correct option is C.

Explanation:

A storage cylinder of recovered R-22 at normal room temperature (about 75 F) in the absence of non-condensables will be pressurized to around 175 psig (pounds per square inch gauge).

When a gas is confined in a closed container like a cylinder, its pressure increases as the temperature increases. This relationship is described by the ideal gas law, which states that the pressure of a gas is directly proportional to its temperature (when volume and amount of gas are held constant). Therefore, if the temperature of the cylinder is increased, the pressure of the R-22 gas inside will also increase.

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