1. The problem statement, all variables and given/known data Total temperature of mixture= 600 K, mass fraction of vapour to mass of total mixture=0.01 2. Relevant equations Ideal gas law, Mach area relations, Rankine-hugoniot equations 3. The attempt at a solution Applied Clausis-Clapeyron relation to find vapour pressure, Then found total pressure via humidity relation that I found from a research paper, Then found temperature from ideal gas law. Using total temperature and this temperature, from the isentropic flow table, found the area ratio. Is this approach right? or is does it just have to do with assuming a value of static temperature below stagnation temp and proceeding with isentropic relations?