Chapter 6, Problem 6.4P

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.

One-quarter Ibmol of oxygen gas (O2) undergoes a process from p1 = 20 Ib;/in?, T1 = 500°R to p2 = 150 lbę/in?. For the process W = -500 Btu and Q = -227.5 Btu. Assume the oxygen behaves as an ideal gas. Determine T2, in °R, and the change in entropy, in Btu/°R.

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,…

One-quarter Ibmol of oxygen gas (O2) undergoes a process from p, = 20 lb:/in?. T1 = 500°R to p2 = 150 lby/in?. For the process W= -500 Btu and Q = -202.5 Btu. Assume the oxygen behaves as anideal gas. Determine T2, in °R, and the change in entropy, in Btu/PR. Step 1 Determine T2, in °R. T2 = °R Hint Save for Later Attempts: 0 of 1 used Submit Answer Step 2 The parts of this question must be completed in order. This part will be available when you complete the part above.

One-quarter Ibmol of oxygen gas (O2) undergoes a process from P1 = 20 lbf/in?, T1 = 500°R to p2 = 150 lbę/in2. For the process W = -500 Btu and Q = -177.5 Btu. Assume the oxygen behaves as an ideal gas. Determine T2, in °R, and the change in entropy, in Btu/°R.

1)Using the tables for water, determine the specified property data at the indicated states. In each case, locate the state on a sketch of the T–v diagram. a)At p = 2 MPa, T = 300 °C. Find u, in kJ/kg. b)At p = 2.5 MPa, T = 200 °C. Find u, in kJ/kg. c)At T = 170°F, x = 50%. Find u, in Btu/lb.

Q1: a) If for a given gas (Ou/ov)0, find u, the specific internal energy if c, is constant. b) If the equation of state for the gas in part (a) is given by v-(RT/p) = a, find c,- c, for that gas. c) Show that (@h/op)r=-C, (@T/ôp)n.

. Suppose that a room containing 1500 cubic feet of air is originally free of carbon monoxide (CO). Beginning at time t = 0, cigarette smoke containing 5% CO is introduced into the room at a rate of 0.4 cubic feet per minute. The well-circulated smoke and air mixture is allowed to leave the room at the same rate. Let Q(t) be the amount of CO in the room (in cubic feet) after t minutes. Write down an initial value problem for Q(t) and solve for Q(t).

Calculate the work done (in J/mol) for mechanically reversible, isothermalcompression if 1 mol of methyl chloride undergoes a pressure change from 1 bar to 60 bar at 125 ℃. The species follows the virial equation of state ? = 1 +??b. Determine the molar volume (in cm3/mol) of n-heptane at 535 K and 25 bar basedon the generalized compressibility factor correlation. c. Estimate the density (in g/cm3) of saturated liquid ammonia at 320 K.