Consider a mixture that is 30% n-butane, 40% n-pentane and 30% n-hexane. We wish to perform the following calculations.

1. Calculate the bubble pressure and vapor compositions at 80 C.
2. Calculate the dew pressure and liquid compositions at 80 C.
3. Calculate the bubble temperature and vapor compositions at 2 bar.
4. Calculate the dew temperature and liquid compositions at 2 bar.
5. Calculate the fraction of the butane that leaves in the vapor phase if this mixture is sent to a flash unit that operates at 100 C and 6 bar.

Which of the following is an easy way to remember the modified “x” tire rotation? a. nondrive wheels straight, cross the drive wheels b. drive wheels straight, cross the nondrive wheels c. drive wheels crossed, nondrive wheels straight d. drive wheels crossed, nondrive wheels crossed

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.