An ideal gas undergoes two processes: one frictionless and the other not. In both cases, the gas is initially at 200 oF and 1.5 atm, and when the process is over, the gas is at 700 oF and 22 atm. For which process does the gas experience a greater change in entropy

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

On solidification from a melt, the polymer polyethylene forms a semi-crystalline spherulite structure. (i) sketch an individual spherulite and label the amorphous and crystalline regions. (ii) draw a schematic to show the changes in specific volume with temperature during cooling from the melt, comparing it to the theoretical extremes of fully crystalline and fully amorphous (indicate tm and tg)

Explain the strain-hardening phenomenon on the basis of dislocation - dislocation strain field interactions. also, briefly describe what generally happens to the ductility of a metal that has been strain hardened (i.e. does strain hardening make a metal more ductile or