H2 (hydrogen) is traveling through 120 ft of pipe, with 5 elbows. the psi at inlet is 10 psi higher than outlet. operating temperature at inlet is 150f (assume adiabatic flow). outlet is 10 feet below inlet. pipe is schedule 160 carbon steel with a nominal diameter of 1 inch (actual inside diameter is 0.815 inches). what is the volumetric flow rate at outlet. inlet pressure is 1810 psi, outlet is 1800 psi.

Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.

Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented

An open feedwater heater operates at steady state with liquid entering at inlet 1 with t? = 40°c and pl = 1 .2 mpa. water vapor att2-200°c and p2 = 1.2 mpa enters at inlet 2. saturated liquid water exits with a pressure of pa 1.2 mpa. neglect heat transfer with the surroundings and all kinetic and potential energy effects, determine the mass flow rate of steam at inlet 2 if the mass flow rate of liquid water at inlet 1 is given as 2 kg/s.