Methane gas can be burned according to the following reactions:
CH4 + 2 O2 =CO2 + 2 H2O (1 )
2 CH4 + 3 O2 = 2 CO + 4 H2O (2)
If a reactor is fed with 100 mol/h of methane.
a) What would be the theoretical or stoichiometric O2 flow rate, if the combustion in the reactor is complete (only reaction 1 occurs)?
b) What would be the theoretical O2 flow rate if 70% of the methane reacts to form CO?
c) If 100% air is supplied in excess, and consequently only reaction 1 occurs, what will be the air flow into the reactor?

Agas is compressed from vi 0.3 m, p 1 bar to of v2 0.1 m3, p2--3 bar. pressure and volume are related linearly during the process. for the gas, find the work, in kj.

Liquid flows at steady state at a rate of 2 lb/'s through a pump, which operates to raise the elevation of the liquid 100 ft from control volume inlet to exit. the liquid specific enthalpy at the inlet is 40.09 btu/lb and at the exit is 40.94 btub. the pump requires 3 btu/s of power to operate. if kinetic energy effects are negligible and gravitational acceleration is 32.174 tt/s, the heat transfer rate associated with this steady state process is most closely 1)-2,02 btu/s from the liquid to the surroundings 2)-3.98 btu/s from the surroundings to the liquid. 3)-4.96 btu/s from the surroundings to the liquid. 4)-1.04 btu/s from the liquid to the surroundings.

Air (c-1.006 kj/kg. k, r-0.287 kj/kg. k) enters a nozzle steadily at 280 kpa and 77°c with a velocity of 50 m/s and exits at 85 kpa and 320 m/s. the heat losses from the nozzle to the surrounding medium at 20°c are estimated to be 3.2 kj/kg. determine (a) the exit temperature and (b) the total entropy change for this process. solve this problem using constant specific heats.