At low pressures, the compressibility factor of a van der Waals gas is given by the equation: Z = 1+ (b-a/RT) P/RT Calculate ΔG (in units J/mol) associated with the isothermal compression of nitrogen gas at 298 K from 10 bar to 25 bar. The van der Waals constants of nitrogen gas are a = 1.408 L^2-bar-mol and b = 0.03913 L-mol^-1

the answer of part A is 0.721

A 10.0 mL sample of CO2 is collected by the downward displacement of water at 23.0°C and a room pressure of 100.5 kPa. What is the volume of dry CO2 at 0.00°C and 90.0 kPa?

A rigid insulated tank is divided into 2 equal compartments by athin rigid partition. One of the compartments contains air, assumedto be an ideal gas at 800 kPa and 250◦C. The other compartment isunder a vacuum. The partition is suddenly broken and the air rushesinto the evacuated compartment. The tank pressure and temperatureeventually equilibrate. (a) what is the final temperature of the gas ◦C?(b) what is the final pressure, kPa?(c) how much work is done by the system, kJ/kg?(d) how much heat is transferred to the system kJ/kg

4. The equation of state for a van der Waal's gas is: RT V-by², where Vm is the molar volume, V/n. p= m a m Starting with an expression for U(S,Vm), derive an expression for the internal pressure, TT, and calculate its change when a van der Waal's gas with a = 4.14 atm L²mol-2 and b = 5.15 x 10-2 Lmol-¹ is cooled from 200°C to 10°C.