Using the combined gas law, what would be the final pressure in psig with given conditions?

To determine the final pressure using the combined gas law, you need to consider how pressure, volume, and temperature interact. The combined gas law is expressed as:

(P1 * V1) / T1 = (P2 * V2) / T2

In this equation, P represents pressure, V represents volume, and T represents temperature, with the subscripts indicating the initial (1) and final (2) states of the gas.

In this scenario, the choice of 219 psig represents pressure measured relative to the atmospheric pressure, which is relevant in many practical applications involving gases. When solving for the pressure using the combined gas law, you will often find that the final pressure calculated will give you a reading in absolute pressure (psia), meaning it includes atmospheric pressure.

Thus, if you calculated the final pressure and arrived at a value of 219 psia, you would then subtract atmospheric pressure (typically around 14.7 psi at sea level) to convert it to gauge pressure, arriving at 219 psig. This conversion is crucial to ensure that the pressure reading aligns with common practical applications in the field of millwrighting and other mechanical environments where gauge pressure is preferred.

Ultimately, the correct answer indicates a