An empty greenhouse with a volume of 60m³ has cracks around doors and windows so that air can flow through and allowing the pressure inside to always remain equal to that of the surrounding environment. On a particular day when the atmospheric pressure is 100kPa, the air in the greenhouse changes temperature from 10℃ to 40℃ by means of radiative heating from the sun. Assume that the air can be modeled as an ideal gas with constant properties cᵥ=715.9J/kg*K and R?=286J/kg*K.  (1) What is the change in energy stored by the system?  (2) Treating the greenhouse as an open system, determine the heat transfer necessary to produce this temperature change.  (3) Is the process totally reversible? Justify your answer. If it is not totally reversible, identify the source(s) of irreversibility.

Q: What is the specific internal energy of air as an ideal gas at T = 960 K in kJ/kg

A:

Q: Use the Ideal Gas Law to show how pressure and temperature are related in the case of two footballs…

A:

Q: A rigid tank filled with R-134a is divided into two chambers by a membrane. The membrane is a…

A: As per our guidelines we are supposed to do only 3 subparts, kindly post other part separately.

Q: An ideal gas is enclosed in a cylinder with a movable piston on top of it. The piston has a mass of…

A: This problem is related to fluid mechanics. Fluid mechanics is the subject of mechanical engineering…

Q: 2.8 kg of air is inside a closed, rigid tank as shown. Initially the air is at a pressure of 2.2 bar…

A:

Q: An ideal gas with γ= 1.40 occupies 8.26 L at 335 K and 59.2 Kpa pressure. It’s compressed…

A: Given data:

Q: An ideal gas with a molecular mass of 31 is contained in an inflexible tank. It is heated from…

A: Given data :- Molecular mass=31 T1=256.79°C T2= 555.35 °C Change in internal energy = 184 kJ/kg

Q: A spherical balloon of 1 m diameter contains a gas at 150 kPa. the gas inside the balloon is heated…

A:

Q: Determine the mass of air in lbm when the pressure is 21.17 psi and the temperature is 93.6°F in a…

A:

Q: A cylinder in an initial position contains air at a pressure of 3 bar and temperature of 27'C . The…

A:

Q: A 0.1 kg of ice at 0 degrees Celsius is heated until half of it becomes water at 100 degrees Celsius…

A: To find: The total amount of heat required to accomplish this Given: The mass of ice is m=0.1 kg.…

Q: 1.25 cubic meter of a perfect gas at 1.9 bar and 15.1°C is compressed to a volume of 0.54 m³ and a…

A:

Q: The piston cylinder assembly initially has a temperature of 450 ºC  and a pressure of 2.5 m3 of…

A:

Q: A frictionless piston/cylinder apparatus 100 mm in diameter contains water vapor with a quality of…

A: intial qaulty x1=0.2mass og the piston=16 Kgpiston dia = 100mmintial height =50 mmT1=105.1…

Q: A quantity of gas has a pressure of 3.5 bar when the volume and the temperature are 0.03m³ and 35°C…

A:

Q: the cylinder is identical to the ambient pressure of 1 atm  at the initial state. The piston moves 2…

A: given:d=10cml=1.25mP=1atmpiston slide=2cm

Q: Determine the mass of air in lbm when the pressure is 18.44 psi and the temperature is 80.8°F in a…

A: For solution refer below images.

Q: bic meter of a perfect gas at 1.6 bar and 17.7°C is compressed to a volume of 0.65 m³ and a pressure…

A: Given:V1=1 m3P1=1.6 bar =160 KPaT1=17.7°C =290.7 KV2=0.65 m3P2=5.9 bar =590 KPa

Q: Air undergoes an isochoric process from T1 = 300°C to T2 = 250°C as an ideal gas in a closed system.…

A: Given data: The process is isochoric, so V1=V2 The initial temperature is T1=300°C=573 K The final…

Q: 1.84 cubic meter of a perfect gas at 1.6 bar and 16.2°C is compressed to a volume of 0.86 m³ and a…

A: Using perfect (ideal) gas equation PV = nRT In both the cases, the number of moles remain constant.

Q: How much work is done when 10 cubic meter of an air is initially at a pressure of 1 atm and a…

A: Given data: V=10 m3P1=1 atmT1=0°FP2=6 atm Need to determine the work is done.

Q: An ideal gas with a molecular mass of 32 is contained in an inflexible tank. It is heated from…

A:

Q: what pressure, in bar, should the valve be set to have a maximum temperature of 200°C?

A: Given that: V1 = 1 m3. m = 2 kg. T1 = 100 oC. T2 = 200 oC It is required to determine final pressure…

Q: The decrease in internal energy of 3lb of an ideal gas is 325BTU when the pressure decreases from…

A: Givenm=3lb∆U12=-325 BtuP1=100 psia=100×144=14400 psfP2=20psia=20×144=2880 psfV1=1.5 ft3V2=4.5…

Q: The radiator of a steam heating system has a volume of 56 dm3 and uses dry saturated steam at a…

A: (a) Write the given data. Volume of system, V=56 dm3=56 dm30.001 m31 dm3=0.056 m3State 1:…

Q: Determine the mass of air in lbm when the pressure is 19.21 psi and the temperature is 76.6°F in a…

A:

Q: An ideal gas with a molecular mass of 32 is contained in an inflexible tank. It is heated from…

A:

Q: For an ideal gas, the decrease in internal energy of 1.4 kgm is -343 kJ when the volume increases…

A:

Q: How much work is done by the gas if the ratio between its specific heat in constant volume and the…

A: Write the given data. Pinitial=6 PaVinitial=0.01 m3Pfinal=2 PaVfinal=0.04 m3cVR=1.5

Q: There is a calorimeter composed of a thermally insulated container. Inside it are 1.2 kg of ice at…

A:

Q: An ideal gas in a leak tight cylinder-piston assembly undergoes an isobaric compression at a…

A:

Q: Consider Case #2 from Table 1: Table 1: Case numbers and their respective Pg and V2 Initial pressure…

A: Given: P1 = 1000 kPa T1 = 140 °C m = 12 kg V2 = 0.270 m3 T3 = 0 °C

Q: Air undergoes an isothermal expansion as an ideal gas in a closed system.  The air pressure…

A: In an isothermal process, temperature of the system remains constant.

Q: 2. A dividing wall divides an insulated container into two compartments as shown in the figure.…

A:

Q: 1 kg air is contained in an INSULATED piston-cylinder device. Initially, the temperature and…

A: The insulated system is system from which heat transfer is zero. The reversible process, and…

Q: The molar specific heat at constant volume of an ideal gas is equal to 2.5 times the universal gas…

A: Given:molar specific heat at constant volume of an ideal gas= 2.5 times the universal gas…

Q: A piston-cylinder device contains an ideal gas of nitrogen. At the initial state, the volume is V₁=…

A:

Q: ft-lb Two pounds of gas, for which R = 26 - Ib-R and k =1.10 undergo a polytropic process from P =…

A: Gas m = 2 lb = 0.907 kg  R = 26 ft-lb/lb-R = 0.14 kj/kg.k k = 1.1 P1 = 15 psia = 103.4 kpa T1 = 100F…

Q: A fixed quantity of steam of mass 0.12 kg has an initial temperature and pressure of 375°C and 5.5…

A:

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.