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

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.

Carbon dioxide at a temperature of 30°C and at a pressure of 580kPa absolute, with a gas constant of 288N-m/kg-°K. A. What is the unit weight of the carbon dioxide in N/cu.m B. What is the mass density of the carbon dioxide in kg/cu.m

A volume of 400 cc of air is measured at a pressure of 740 mm Hg absolute and a temperature of 18 ˚C. What will be the volume (in cc) at 760 mm Hg and 0 ˚C?