One lb of oxygen in a piston cylinder assembly undergoes a cycle consisting of the following processes:Process 1-2: Constant-pressure expansion from T1=450R, p1=30 lbf/in^2 to T2=1120R. Process 2-3: Compression to T3=800R and p3 = 53.3 lbf/in^2 with Q(2-3) = -60 Btu. Process 3-1: Constatnt-volume cooling to state 1.Employing the ideal gas model with cp evaluated at T1, determing the change in specific entropy in Btu/lb * R, for each process.

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

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater

A-mn has a cubic structure with a0 0.8931 nm and a density of 7.47 g/cm3. b-mn has a different cubic structure, with a0 0.6326 nm and a density of 7.26 g/cm3. the atomic weight of manganese is 54.938 g/mol and the atomic radius is 0.112 nm. determine the percent volume change that would occur if a-mn transforms to b-mn.