Hydrogen gas (H2) at 35°C_and pressure p enters an insulated control volume operating at steady state for which Wer = 0. Half of the hydrogen exits the device at%3D2 bar

and 90°C and the other half exits at 2 bar and -20°C. The effects of kinetic and potential energy are negligible. Employing the ideal gas model with constant cp =14.3 kJ/(kg K), determine the minimum possible value for the inlet pressure p, in bar.Ans: 2.12 bar