Answer :
The correct answer is c. 19.92 psi. To determine the absolute pressure given a vacuum pressure of 5.22 psi at standard conditions, you need to add the atmospheric pressure to the vacuum pressure. The standard atmospheric pressure at sea level is 14.7 psi. Therefore, absolute pressure is the sum of the vacuum pressure and the atmospheric pressure.
Therefore, the calculation for absolute pressure ( extbf{Pabs}) is:
extbf{Pabs} = vacuum pressure ( extbf{Pg}) + atmospheric pressure ( extbf{Patm})
extbf{Pabs} = 5.22 psi + 14.7 psi
extbf{Pabs} = 19.92 psi
Thus, the correct answer is c. 19.92 psi.
