Chapter 6, Problem 6.83P

1. Which of the following seven variables are extensive? Which ones are intensive variables? M, V, T, P, N, p, and V 2. ( closed ) According to state principle, which of the following properties is fixed for liquid water in a system at 25°C and 1 atm (i.e., single-phase and single component)? Select all correct answers. A. The water's molar volume B. The water's specific volume C. The water's total volume D. The water's density According to state principle, which of the following properties is fixed for 100 g liquid water in a closed system at 25°C and 1 atm (i.e., single-phase and single component)? Select all correct answers. L ft A. The water's molar volume B. The water's specific volume C. The water's total volume D. The water's density 3. ( ) Water flows into the top of an open barrel at a constant mass flow rate of 30 lb/s. Water exits through a pipe near the base with a mass flow rate proportional to the height of water inside: M₁ =9L, where L is the instantaneous water height,…

1. The equation of state of the actual gas is as follows. v (P+ 10 /v^ 2 )= RT, provided that the units of v and P are m^ 3 /kmol and kPa. 300K, 0.3 kmol of gas in the cylinder expanded from 2m^3 to 5m^3 in an isothermal process. Answer the following questions. (1) What is the unit of the number 10 in the above equation? (2) Find the work done during this process. (3) If the equation for the internal energy of this gas is the same as the internal energy of the ideal gas, find the amount of heat transfer during this process.

An ideal gas contained in a piston-and-cylinder device undergoes a thermodynamic cycle made up of three quasi-equilibrium processes. Step 1-2: Adiabatic compression from 330 K and 9.35 atm to 12.58 atm Step 2-3: Isobaric cooling Step 3-1: Isothermal expansion   c.) Calculate Q, W, ΔU and ΔH, in J/mole, for each step in the process and for the entire cycle. Assume that CP = (5/2) R. d.) Is this cycle a power cycle or a refrigeration cycle?  Explain. Calculate the thermal efficiency or COP of the cycle, whichever is appropriate.

Which of the following is most likely the specific volume of steam at P = 1000 kPa and T = 800 °C?0.35281 m3/kg0.41177 m3/kg0.49432 m3/kg0.61813 m3/kg Which of the following is most likely the specific volume of carbon dioxide at P = 6000 kPa and T = 320 °C?0.01053 m3/kg0.01097 m3/kg0.01771 m3/kg0.01840 m3/kg Which of the following is most likely the specific volume of ammonia at P = 800 kPa and T = 200 °C?0.16068 m3/kg0.18819 m3/kg0.22669 m3/kg0.28445 m3/kg

Which of the following is most likely the specific volume of ammonia at P = 800 kPa and T = 200 °C?0.16068 m3/kg0.18819 m3/kg0.22669 m3/kg0.28445 m3/kg Which of the following is most likely the specific volume of nitrogen at P = 1600 kPa and T = 100 °C?0.01211 m3/kg0.01601 m3/kg0.01878 m3/kg0.02244 m3/kg

find the changes in h  as appropriate. The initial state pressure is p1 = 0.5 MPa. the final state is 2.   a.  constant volume :                   v1 = 0.3 m3/kg,            p2 = 0.3 MPa; b. constant entropy :                    s1 = 6.3 kJ/kg K,        p2 = 0.15 MPa; c. constant volume :                    h1 = 2500 kJ/kg,          p2 = 0.2 MPa; d. constant enthalpy :                 s1 = 6.4 kJ/kg K,        p2 = 0.2 MPa;

The state of an ideal gas with C_P = (5/2)R is changed from P1 = 1 bar and V1=12 m3 to P2​=12 bar and V2=1 m3 by the following mechanically reversible processes: (a) Isothermal compression. (b) Adiabatic compression followed by cooling at constant pressure. (c) Adiabatic compression followed by cooling at constant volume. (d) Heating at constant volume followed by cooling at constant pressure. (e) Cooling at constant pressure followed by heating at constant volume. Calculate Q, W, ΔU, and ΔH for each of these processes, and sketch the paths of all processes on a single PV diagram.

Find the enthalpy of water under the conditions below. including determining the position of each The following states on T-v P-v and P-T diagrams. 1. P = 10 MPa, Saturated vapor 2. P = 10 MPa, quanlity = 5% 3. P = 10 MPa, T = 600 celcius.

A rigid, insulated vessel is divided into two compartments connected by a valve. Initially, one compartment, occupying 1.0 ft, contains air at 50 lb/in?, 750°R, and the other, occupying 2.0 ft?, is evacuated. The valve is opened and the air is allowed to fill both volumes. Assume the air behaves as an ideal gas and that the final state is in equilibrium. Determine the final temperature of the air, in °R, and the amount of entropy produced, in Btu/°R.