Show that if the atmosphere is isothermal, the temperature change of a parcel of air rising adiabatically is T(z) = Toe-T2/To vinU bolgolewor where To and To are the temperatures of the parcel at the surface and of the air at the surface, respectively.

Q: Water at a temperature of 400oF has a quality of 0.7. The internal energy of the water is ________…

A: given temperature ofwater , T=400oF=204.444oCquality, x=0.7

Q: The following are examples of a steady-state flow except: a. running a gas through a fan b.…

A:

Q: A system consisting of a large boat and all its contents. The air inside the boat and outside the…

A: To find: Whether the statement is correct or not.

Q: Select the expression representing the flow work (flow energy), where P is pressure, Vol is volume,…

A: Given p is pressure, vol Is  volume, and  V is the velocity,  Option A is the correct answer

Q: b) enters the turbine at a velocity of 70 m/s. The steam leaves the turbine at a point 2 m below the…

A: Solution is given below

Q: The rate of heat withdrawal from a system necessary to freeze 2000 lb of water at 32oF in 24 hours,…

A:

Q: What is the Kelvin equivalent of 70 0F.

A: Given data: The temperature is TF = 70 oF.

Q: The process shown on the p-V graph above is

A: Answer Option b) Isometric

Q: Evaporative cooling PLEASE DO NOT USE PSYCHROMETRIC CHART. THANK YOU In the diagram below inlet air…

A: Given data:

Q: Thermal mass is a property of the mass of a building which enables it to store:

A: Thermal Mass: The ability of a material to absorb and store heat or thermal energy is a Thermal…

Q: a rigid 3ft ^3 vessel contains R-134 a originally at -20 F and 27.7 percent quality. The refrigerant…

A: Given Data Initial temperature is: T1=-20°F Final temperature is : T2=100°F Dryness fraction is :…

Q: Describe briefly the difference between a heat engine and a heat pump.

A: To explain: The difference between a heat engine and heat pump. Explanation: The difference between…

Q: During a compression process of the air in a compressor, O A. both the air pressure and temperature…

A: Correct option: A. Both the air pressure and temperature increases.

Q: Water is the working fluid in a regenerative Rankine cycle with one closed feedwater heater and one…

A: Given: P1=1000 lbf/in2, T1=900oFP2=400 lbf/in2P3=140 lbf/in2Pcond=P4=1.5…

Q: systems use compressed air to deliver work.

A: Pneumatic system.

Q: Volume flow rate is also called A. Discharge B. Mass flow C. Velocity D. Momentum

A: Option A is correct.

Q: Write the full energy balance equation for an open system with 1 inlet and 3 exit and operating in…

A: The steady flow energy equation is represented for the given condition for an open system.

Q: Why must a room air conditioner be

A:

Q: During an adiabatic process _________ .   a. the temperature remains constant.   b. the system…

A: We konw that,  In adiabatic process, no heat transfer takes place,

Q: 1. Steam enters an adiabatic turbine at a pressure of 7 MPa, a temperature of 500 °C and a velocity…

A: Given-Information: Inlet Pressure is p1=7MPa Inlet Temperature is T1=500°C Inlet Velocity is…

Q: Problem 10.1 A simple Rankine cycle operates with a low pressure of 50 kPa and a high pressure of 5…

A: The condenser pressure, Pc = 50 kPa The boiler pressure, Pb = 5 MPa The isentropic efficiency of…

Q: Which of the following would always cause the internal energy of the system to decrease? A.…

A: Given data:- A. Isochoric heating B. Adiabatic expansion C. Isothermal compression  To find:- the…

Q: he second law of thermodynamics relates to? A. enthalpy B. entropy C. free energy D. heat

A: Given Data : Second law of thermodynamics

Q: Referring to the reversible heat pump cycle shown in the figure, p₁ = 14.7 lb/in², P4 = 41.5 lb/in²,…

A: The given information in the problem is listed in the following attached image:

Q: Figure on the right provides steady-state operating data for an ideal vapor-compression…

A: Given data :- The mass flow rate of refrigerant (m) = 30.59 lb/min     Determine :- a) the…

Q: 4. Consider steady, one-dimensional heat flow through two plane walls which are exposed to…

A: Solution: Since thickness of the insulation is missing or not given, we cannot find the individual…

Q: systems use compressed

A: Pneumatic System

Q: A steady flow of room temperature

A:

Q: How much heat in Btu must be transferred to 42lb of air to increase the temperature by 250 0F at…

A: Given:-  Mass (m) = 42 lb Temperature change (∆T) = 250 °F Process : Constant Pressure Process For…

Q: A piston-cylinder assembly contains 0.4 lb of air initially at a pressure of 30 lb/in² and a…

A: Given data:mass of air, m=0.4 lbor m=0.18 kgInitial pressure of air, P1=30 lbf/in2or P1=206.84…

Q: Determine the operative temperature, in degree F, of a breathing zone where the air velocity is…

A:

Q: 2. What is the sign of the entropy change for the following? a. Solid sugar is added to water to…

A: a. When a solid sugar is added to water to a solution ,  Entropy increases when solid is converted…

Q: The mass flow rate is m, the volume flow rate is, density is 1 P₁ □A.V=m/v B.m=Vlp OC.V=m/p OD.m=V/v…

A: We know mass density ,  ρ = m/V V=mp

Q: u blow on the back of your hand

A: AIR GETS TO COOL WHEN IT EXPANDS ( FROM THERMODYNAMICS LAWS)

Q: To maintain a dwelling steadily at 68°F on a day when the outside temperature is 50°F, heating must…

A:

Q: Problem 2. Water at 150°F is pumped at the rate of 60 gal/min from a reservoir at atmospheric gauge…

A:

Q: The motion of a liquid in an open tank is that of a combined vortex consisting of a forced vortex…

A:

Q: Which of the following is not a thermodynamic property? A. pressure B. temperature C. volume D.…

A:

Q: Two-phase pipe flow is the simultaneous flow of a gas (or vapor) and a liquid exhibiting…

A: The term 'phase' is used to analyze the state of a matter. For example, solid-phase, liquid-phase…

Q: Water is the working fluid in a reheat-regenerative Rankine cycle with one closed feedwater heater…

A: Given: Net power output of the cycle Pnet=1×109 Btu/hr η=85% To find:

Q: |Part of a refrigeration system operates at steady state with Refrigerant 22 as shown in the figure…

A: a) At state 1 , saturated liquid at 120 lbf/in2. from the R-22 table : Tsat=61.942 °F

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.