Question #1: Find the state of a closed system containing water substance of given mass as mentioned in the table below. Specify the zone in which the point lies and properties v, u, h and s as appropriate. Also comment on the approximated value if applicable Q # Mass [kg] 1 1 2 2 3 1 Property 1 P= 100bar P=15MPa T=170°C Property 2 T=250°C Saturated vapour H=2816.2kJ

For a certain ideal gas R = 25.8 ft.lb /lb °R and k =1.09a. What are the values of cp and cv?b. What mass of this gas would occupy a volume of 15 cu ft at 75 psia and 80 °F?c. If 30 Btu are transferred to this gas at constant volume in (b), what are the resultingtemperature and pressure? include the diagram

Hi Please help me answer this question, answers are already provided, all i need is the solution to understand our lesson. Thank you very much! All is well!

Consider a column of a planet's atmosphere. The planet's atmosphere is a compressible ideal gas at rest that obeys the polytropic relation Po %3D 3/2 Po 3/2 where pis pressure and pis density. Here, p, and P, are the values of pressure and density, respectively, at the planet's surface. Take z (altitude) to be positive upward with z=0 at the surface, take R to be the gas constant for the planet's atmosphere, and take g to be the downward acceleration due to gravity. a) Starting from hydrostatic balance and the polytropic relation above, derive an expression for the pressure field, p(z), in terms of the given parameters. Leave all parameters except the polytropic index as algebraic. b) Derive an expression for the density field, p(z), in terms of the given parameters. Leave all parameters except the polytropic index as algebraic. c) Derive an expression for the temperature field, T(z), in terms of the given parameters. Leave all parameters except the polytropic index as algebraic.