1. A flue gas is cooled from 1050C to 150C, and the heat is used to generate saturated steam at 100C in a boiler. The flue gas has a heat capacity given by Water enters the boiler at 100C and is vaporized at this temperature; its latent heat of vaporization is 2256.9 kJkg 1. Take R = 8.314 Jmol1K1. = 3.83 + 0.000551/ With reference to a surroundings temperature of 25C, what is the maximum work, in kJmol1 of flue gas, that can be accomplished by the saturated steam at 100C if it condenses only and does not sub-cool? (Include a minus sign if required.) The maximum work in kJmol1.

2. A nuclear power plant generates 750 MW; the reactor temperature is 315C and a river with a water temperature of 20C is available. If the actual thermal efficiency of the plant is 60% of the maximum, at what rate must heat be discarded to the river, and what is the temperature rise of the river if it has a flow rate of 165 m3s1? The rate at which heat must be discarded to the river in MW. The temperature rise of the river is in K.

3. Ethylene vapor is cooled at atmospheric pressure from 830C to 35C by direct heat transfer to the surroundings at a temperature of 23C. With respect to this surroundings temperature, what is the lost work of the process in kJmol1? What is the work obtained from a reversible heat engine operating with the ethylene vapor as heat source and the surroundings as sink? The heat capacity of ethylene is given in the table below. The lost work is in kJmol1.? The work obtained from the reversible heat engine in kJmol1?

4. One cubic meter of an ideal gas at 600 K and 1000 kPa expands to 6 times its initial volume. Calculate the final temperature, pressure, and the work done by the gas for the following case. (Take the value of Cp as 21 Jmol-1K-1 and R as 8.314 Jmol-1K-1.) Consider an adiabatic, irreversible process in which expansion is against a restraining pressure of 100 kPa. (Include a minus sign if required.) The final temperature? The final pressure? The work done in kJ?

5. Calculate compressibility (Z) and the molar volume (V) for ammonia for the following condition. (For ammonia, Tc = 405.7 K, Pc = 112.8 bar, and = 0.253.)