A vacuum gauge connected to a chamber reads 25 kPa at a location where the atmospheric pressure is 97 kPa. Determine the absolute pressure in the chamber.

A vacuum gauge connected to a chamber reads 25 kPa at a location where the atmospheric pressure is 97 kPa. Determine the absolute pressure in the chamber.

Solution:

       Here

            Vacuum Pressure = P_vac = 25 KPa

            Atmospheric Pressure = P_atm= 97 KPa

        We know that

            Absolute Pressure = P_a = P_atm - P_vac

            Absolute Pressure = P_a= 97-25 = 72Pa