Section: Thermodynamics | Marks: 2
Helium in a piston/cylinder assembly at 20oC and 100 kPa is brought to 400 K in a reversible polytropic process with exponent n = 1.25. Assume helium to be an ideal gas. The molecular mass of helium is 4.003 kg/kmol. The specific work in the process is approximately
- A. – 800 kJ/kg
- B. – 788 kJ/kg
- C. 788 kJ/kg
- D. – 888 kJ/kg
Answer: D. – 888 kJ/kg