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(b) A mixture of gases has the following molar composition: N265%;O218%;NH39% and H2O8%. (i) Calculate the composition in mass \%. (ii) Calculate the volume in m3 of 10kg of the mixture at 873K and 10atm gauge pressure. (5 marks) ( 4 marks) Molecular weights: N228;O232;NH317;H2O18 Universal Gas Constant R0.08206m3atmkmol1K1 1 (c) The following data extracted from the Steam Tables shows the values of specific volumes of steam, V(ft3Ib1) at temperatures between 450 and 700F and pressures between 50 and 95 psia. By repeated interpolations, determine the change in volume, V when one Ib of steam is cooled from 640F and 92 psia to 480F and 52 psia. (10 marks) Mid Tern 2019