1. Helium in an external storage tank on a spacecraft is expanded through an isentropic attitude control nozzle with a negligible inlet velocity from 2.00 MPa, 10.0 K to 0.0100 MPa. Assuming constant specific heats and using the generalized charts, determine the exit temperature and velocity.
2. Sulfur dioxide with a negligible inlet velocity is expanded through an isentropic nozzle from 20.0 MPa, 500. K to 0.200 MPa in a chemical processing unit. Assuming constant specific heats and using the generalized charts, determine the exit temperature and velocity.