Two kilograms of gas with R=0.218 kJ/kg-K undergoes a process and result =2250 kJ ∆U=1660 kJ. what is the specific ratio?​

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.