Which one of the following would be employed by the main contractor on site?
A
Clerk of works
B
Building control officer
C
Subcontractor
D
Architect

Carbon dioxide gas expands isotherm a turbine from 1 mpa, 500 k at 200 kpa. assuming the ideal gas model and neglecting the kinetic and potential energies, determine the change in entropy, heat transfer and work for each kilogram of co2.