Section: Thermodynamics | Type: NAT | Marks: 2
A mixture of helium (He) and nitrogen (N2) expands in a turbine from 800 kPa to 100 kPa. The mixture composition is 40% He and 60% N2 by mass. The turbine inlet temperature is 1000 K. The temperature (in K) at the turbine exit is ________________(rounded off to two decimal places). Assume: The process is isentropic. Kinetic and potential energy changes in the process are negligible. He and N2 behaves as ideal gases. Specific heat capacities are constant. Use the following data: Ratio of specific heat capacities for He and N2 are 1.67 and 1.4, respectively. Specific heat capacities at constant pressure for He and N2 are 5.19 kJ/kg-K and 1.04 kJ/kg-K, respectively.