Problem 1

One kilogram on a diatomic ideal gas undergoes the following four step process

starting at Point A (100 kPa, 300K, 4 m³)

• A => B Isothermal compression that quarters the volume (to 1 m³)

• B => C Isobaric expansion that triples the temperature (to 900K)

• C => D Adiabatic expansion to the original volume (to 4 m³).

• D=> A Isochoric process to the original pressure (to 100 kPa).

(a) Determine P, V, and T, for all points.

(b) What is AU, Q, W, AH & AS for each leg of the cycle?

(c) What is the efficiency of this cycle? (

d) Sketch a P-V diagram and T-S diagram, indicating P, V, T, for all points & AU, Q, W,

AH & AS for each leg.