i Q2:The original reservoir pressure in a gas field was 2500 psia and the reservoir temperature was 190F for a gas of the following composition What would be the reservoir pressure when one half of the gas has been withdrawn isothermally from the reservoir? Component Mole% MW(Ib/Ibmole) Methane 91.32 16.04 Ethane 4.43 30.07 Propane 2.12 44.10 Butane 1.36 58.12 Pentane 0.42 72.15 Hexane 0.15 86.18 Heptane and plus 0.20 104.00 RO (12m)