Chapter 7, Problem 7.5P

Possible solution as soon as possible

3.3 Evaluate the specific physical exergy, ePH, in kJ/kg, of a stream of (a) saturated water vapor at 100°C, (b) saturated liquid water at 100°C, (c) Refrigerant 134a at 0.2 MPa, 40°C, and (d) dry air at 0.3 MPa, 400 K.

3.1 For discussion: (a) Is it possible for exergy to be negative? Discuss. (b) Consider an evacuated space with volume V as the system. Eval- uate its exergy and discuss. PH associated with (c) Is it possible for the specific physical exergy e' a stream of matter to be negative? Discuss.

Show your complete solution and answer to the given problem. Please also include schematic diagram.Thank you.

Carbon dioxide (CO2) at 1 bar, 300 K enters a compressor operating at steady state and is compressed adiabatically to an exit state of 10 bar, 580 K. The CO2 is modeled as an ideal gas, and kinetic and potential energy effects are negligible.For the compressor, determine:(c) the percent isentropic compressor efficiency.

Twenty pounds of air initially at 1560°R, 3 atm fills a rigid tank. The air is cooled to 1040°R, 2 atm. For the air modeled as an ideal gas: a) Indicate the initial state, final state, and dead state on a T-v diagram b) Determine the heat transfer, in Btu c) Determine the change in exergy, in Btu, and interpret the sign using the T-v diagram of part (a) Let To = 520°R, Po = 1 atm and ignore the effects of motion and gravity.

3. A mole of an ideal, diatomic gas undergoes isothermal, reversible expansion from 1.0 cubic diameter to 10.0 cubic diameter at 100 degrees celsius. if the same gas undergoes irreversible expansion against a constant pressure of 1.00 bar, which of the following would change? a. internal energy b. entropy c. free energy d. enthalpy

A system consists of 2 kg of water at 100°C and 1 bar. Determine the exergy, in kJ, if the system is at rest and zero elevation relative to an exergy reference environment for which To = 20°C, po =1 bar.

Which of the following statements about an adiabatic process is untrue?   a. All of the above statements are untrue.   b. The ideal gas law no longer applies.   c. PVγ = constant   d. The change in entropy is zero.   e. The net heat transfer is zero.