Problem 2: Four Processes are shown below. Each process occurs in a well-insulated piston cylinder assembly and starts from the same initial state, state 1. Put the final temperatures in order from highest to lowest. Explain. Weightless, frictionless piston M T₁ P₁ State 1 MT=M Patm Weightless, frictionless piston Patm -- ТА State A om P₁ Well State 1 Insulated Process A P atm Weightless, frictionless piston TB State B M M MT=M T₁ P₁ State 1 Weightless, frictionless piston Well Well Insulated Insulated Patm Patm Process D ªo Fª Process B T₁ T₁ M Patm am P₁ Well State 1 Insulated Process C M M a) In Process A, a large block of mass M is removed from the piston. b) In Process B, an equivalent mass M is removed in incremental amounts. c) In Process C, a large block of mass M is placed on the piston. d) In Process D, an equivalent mass M is added in incremental amounts. Tc State C Patm M TD Patm State D

Problem 2: Four Processes are shown below. Each process occurs in a well-insulated piston cylinder assembly and starts from the same initial state, state 1. Put the final temperatures in order from highest to lowest. Explain. Weightless, frictionless piston M T₁ P₁ State 1 MT=M Patm Weightless, frictionless piston Patm -- ТА State A om P₁ Well State 1 Insulated Process A P atm Weightless, frictionless piston TB State B M M MT=M T₁ P₁ State 1 Weightless, frictionless piston Well Well Insulated Insulated Patm Patm Process D ªo Fª Process B T₁ T₁ M Patm am P₁ Well State 1 Insulated Process C M M a) In Process A, a large block of mass M is removed from the piston. b) In Process B, an equivalent mass M is removed in incremental amounts. c) In Process C, a large block of mass M is placed on the piston. d) In Process D, an equivalent mass M is added in incremental amounts. Tc State C Patm M TD Patm State D

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter2: Matter And Energy

Section: Chapter Questions

Problem 30RQ: A gas is compressed inside a compressor's cylinder. When the piston is at its bottom dead center,...

See similar textbooks

Similar questions

Two moles of an ideal diatomic gas is taken through the cycle shown. At the state 1, the pressure is P1 and the volume is V. If p =300 kPa and V, = 040 m', find p2, P3 and T3- Also compute W, Q. AE per cycle, and the thermal efficiency n. int isothermal Adiabatic Vị 3V1 Volume Pressure
17. An ideal gas of molecular mass 30 and specific heat ratio 1.38 is compressed according to the law pul 25 = constant, from a pressure of 1 bar and 60°C to a pressure of 16 bar. Calculate the temperature at the end of compression, the heat received or rejected and workdone by the gas during the process. Assume 1 kg mass of the gas. Use only calculated values of c, and c n
PART- Q.4. Consider a system shown in the figure. Square chamber A, initlally contains Argon at 25 C, 100kPa in equilibrium. Piston-1 initially at stops and has mass such that 125kPa will float it. The system extends in thickness direction 0.2m, and other dimensions are as mentioned in the k 20 kN/m figure. Heat is added to Argon till its pressure reaches 200kPa. Both pistons are square in shape. Neglect space occupied by stops. a) Is piston 1 touching the upper stops in the final state? Justify. Plston 1 Chamber A b) Is piston 2 touching the stops in the final state? Justify. c) What is the work done and heat added during the entire process? d) Plot the complete process on P-V diagram. e) What is final temperature? 0.2 m 0.1 m- Plston 2 40.1 m- -0.2m-
) Two boilers, one with superheater(B1) and other without superheater(B2) are delivering equal quantities of steam into a common main. The pressure in the boiler and main is 20 bars. The temperature of the steam from a boiler with a superheater is 350oC and temperature of the steam in the main is 250oC. The steam in B2 is wet steam at 20oC. i) Draw a sketch of the problem with all thermodynamic properties from steam table shown on the sketch. ii) Determine the quantity of steam supplied by the other boiler. Take the heat capacity of steam, Cps = 2.25KJ/Kg.hgas= hg + Cps (Tsap-Tsat)
5. Two kilogram of certain gas with R = 0.218 kJ/kg-Kundergoes a process and results to the following changes: AH= 2190 kJ, AU = 1460 kl. D. What is the change in termperature?
21. Determine the change in internal energy if there are 2kg of gas inside a rigid container, for which R=240J/kg-K (k=1.50), initial pressure Pi= 500.16kPa and temperature and T1= 70 C, then pressure increase to 1675kPa. a. 806.0348kJ b. 575.7391kJ c. 773.7934kJ d. 559.7464kJ
p91#13. there are 1.5 Kgm of a gas where K=1.3 and R=0.38KJ/Kgm-degree Kelvin that undergo an isochoric process from p1=0.552 MPa,t1=58.5 degree celsius top2=1.66MPA. during the process,there added 100KJ of heat. compute the heat transferred,chane of internal energy and the change of entropy.
1. Twenty kilojoules of heat is added at constant volume to 2.5 kg. ideal gas (k= 1.25, R = 320 J/kgOK). the initial temperature of the gas is 320C. compute for the following: a. Non-flow work b. final temperature of the gas
1. Consider the following schematic of a power plant (operating in what is called a 'Rankine Cycle') Turbine Steam generator Condenser Coling water Economiaer The power plant control room reports that the plant is operating continuously at the following peak load conditions: a. Power to pump = 300KW b. Rate of steam flow = 25 kg/s c. Cooling water temperature at condenser inlet = 13 C d. Cooling water temperature at condenser outlet = 34 C Additionally, the following measurements were made at various points in the piping connecting the power plant components Data Pressure Temp. Quality enthalpy Specific Velocity (kJ/kg) point (kPa) volume (m/s) (m3/kg) (C) (x) 1 6200 2 6100 43 5900 177 ---- 4. 5700 493 ----- 5 5500 482 ----- 6 103 0.94 183 7 96 43 -----
3. 4.50 mol of N2 gas (Cym = 20.6 J mol K') is enclosed in a piston-cylinder assembly (closed system) and undergoes the cycle depicted graphically below. Assuming N2 behaves as an ideal gas and Cm is temperature independent over the given temperature range, calculate q, w, AU, and AH for each segment. Label each segment with the type of process. Note: segment 2→3 follows the relationship PV = nRT . 1.) 20.0 L 2.) 50.0 L 3.) 5.00 bar T= T; = T, V (L) P (bar)
Thermodynamics Instructions: Draw the T-s and Schematic diagram for this problem
Question 2 The work done during polytropic expansion of gas from state 1 to state 2 is given by: W = (P₂V₂ - P₁V₁) 1-n A pressurised reservoir connected to a vertical barrel is used to launch projectiles as shown in Figure Q2.1. Assume no leakage around the projectile, no friction and no pressure drop across the valve. The barrel is cylindrical with a diameter, D = 50mm and a length, L = 0.8m. The mass of the projectile, M = 1kg. The volume of the reservoir, V = 2 litres. Atmospheric pressure is 1.01 bar. 0 L M Barrel Valve Figure Q2.1 Reservoir Volume, Vr a) By applying conservation of energy, for an initial reservoir pressure and temperature of 2bar and 20degC and assuming polytropic expansion with n = 1.3, find the exit velocity of the projectile. b) If the valve shuts at the instant the projectile leaves the barrel, what mass of gas is used to launch the projectile? c) Prove that a barrel length of 0.64m results in maximum exit velocity. d) Using this barrel length, what is the…