A batch reactor and a PFR are operating side by side with the same influent waste stream. The batch reactor operates on a two-hour cycle (all in and all out), and the PFR receives the waste stream as a constant flow and operates in steady state. The first-order reaction rate coefficient for both reactors is 0.26 hr-1. The flowrate through the 72 m3 PFR is 36 m3/hr. The effluent concentration from the PFR is:

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.

What is creep? what is stress relaxation?