During a normal inhalation, if the lung volume and pressure are 2500 cm3, 3000 cm3 at 5kPa values, and 10 kPa values, how many Joules is the work done against the elastic forces in this process?

Q: nside a piston cylinder. 10g of air is adiabatically compressed. Initially the air is at 27 degree…

A: First Law of thermodynamics: Energy can never be created nor be destroyed but it can be transferred…

Q: kg of water vapor are 2.8mpa and with 100 degrees celsius reject of 2180 kj/kg of steam at constant…

A: To  determine enthalpy(kw), specific internal energy(kw),entropy(kj/K).

Q: Balloon planes are filled with 5,000 moles of helium. The initial helium state is 101.325 kPa and…

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Q: A 200 liter tank initially contains water at 1000 kPa and 1% quality. There is a heat transfer to…

A: Given that: V = volume of the tank = 200 liters P1 = initial pressure = 1000 kPa x1 = initial…

Q: and point out the range

A: The plot of polytropic process on P-V and T-S diagram for endothermic, volume decrease, heating and…

Q: An ideal gas enclosed in a 1.77ft3 rigid tank initially at 70°C and 0.93kg/cm2 . Find the…

A: Given data,  V1= 1.77 ft3 = V2 (volume of tank is going to be constant.)  T1= 70°C = 343 K  P1= 0.93…

Q: the first case, there is 5 kg of water at 300 kPa (3 bar) pressure and 60% dryness in a closed…

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Q: Q4/ 1.5 kg of gas occupying 2 m' is compressed adiabatically until its volume is 0.35 m' and…

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Q: Hot water at 100 °C is added to 300 gm of water initially at 0 °C until the mixture is at 40 0C. The…

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Q: 0.15 m3 of an ideal gas at a pressure of 15 bar and 552 K is expanded isothermally to 4 times the…

A: We need to calculate net work and heat transfer

Q: For ammonia , the temperature at -60°f and pressure is 5.3psig Determine internal energy and…

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Q: 3.0 0.44 kg of air at 180°C expands adiabatically to three times its original valume and during the…

A: Given data: m=0.44 kgT1=180°C=453 KT2=15°C=288 KV2V1=3W1-2=52.5 kJ Need to determine the value of…

Q: For the statements in them, put T if they are true and F if they are false. a) ( ) An ideal gas…

A: Dear student, we are suppose to solve only 3 sub parts, please post other parts as a separate…

Q: In an experiment, a certain amount of air is heated at constant pressure from 1.7 m³, 29 °C and 97…

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Q: Calculate the decrease of enthalpy of 2 kg of Butane from 2 MPa, 800 K and 100 kPa, 0.35 kg/m3, in…

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Q: Steam at 2.6MPa, 400°C expand isothermally until its pressure becomes 4.36MPa. Det dH, dU, dS, dV,…

A: given; pressure(P1)=2.6MPa                         =2.6*103KPatemperature(T1)=4000c…

Q: For the situations below briefly explain how you obtained the values and provide the numerical…

A: It is required to determine properties for given process

Q: The specifilc hea carbon dioxide with temperatur chown in th o o

A: given:cp=1.54-345.1T+41300T2T1=325kT2=1100K

Q: 1.56 moles of an ideal gas is placed in a piston and is subjected to the following changes. (a) The…

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Q: 1000CFM of air are compressed at constant temperature of 85°F and 198 psia to 580 psia. For both…

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Q: 2 kg of air is expanded isentropically from 500 K at 0.2 m3 to 400 K. What is the final specific…

A: Mass of air is Initial conditions are:It is compressed isentropically and final temperature is It is…

Q: Methane enters a compressor at 14 psia with a very low velocity and is compressed to 55 psia. The…

A: Write the expression of energy balance.

Q: Calculate the change in entropy in J/K when the temperature of 9.0-kg water changes from 20° C to…

A: To find out the change in entropy for incompressible substance from 20 to 100 degree ∆S0 to…

Q: A piston cylinder device initially contains 0.03(m)^3 of liquid water at 25 °C and 300 kPa. Heat is…

A: Initial volume,V1=0.03 m3Initial temperature,T1=250CInitial pressure ,P1=300 kPaConstant pressure…

Q: A. Two kg of steam with a quality of 22 percent is heated at a constant pressure of 300 kPa until…

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Q: A car tire, which should normally be at 36 psia pressure, has 25 0,C 0.10 kg N2 gas at 32 psia…

A: Given data as per question Initial temperature = 250 c Initial mass = 0.10 kg Initial pressure = 32…

Q: A conduit connects two receptacle of different size. A valve is used at each end which can be opened…

A: Given for first receptable vessel Pressure Pa = 4200 KPaTemperature Ta  = 82o C =82+273 K =355…

Q: Initially, at 150 °C, 350 kPa, there is 1 kg of steam in a fixed volume vessel. Up to 645 kJ of heat…

A: Given: Initial temperature of the steam→Ti=150°C=423.15K Initial pressure of the steam→Pi=350 KPa…

Q: Water at 0.1MPawith a quality of 25% has its temperature raised 40.37 0C in a constant pressure…

A: Find  New quality and new enthalpy

Q: The saturation table for refrigerant-134a lists the following at -40°C: P= 51.25 kPa, hfg=225.86…

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Q: 13m/min of air at 1.0 atm, T1 = 16°C and o1 = 41% is heated to T2 = 27°C. Then the air is humidified…

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Q: A 25 kg copper block at 373 K is dropped into an insulated tank that contains 80 L of water at 293…

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Q: PROBLEM 1. Determine the density of air in kg/m^3 at 120 kPa and 30 deg C. Take R = 0.287 kJ/kg-K.…

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Q: 2. 50% quality steam at a pressure of 50 kPa changed into superheated steamat300 °C and 50 kPa in a…

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Q: Saturated liquid has a specific volume of 0.05048 m3/kg. What are the pressure, temperature,…

A: Givensaturated liquidv=0.050048 m3/kg

Q: Steam at a temperature of 235.5C has a specific volume of 0.17541 m3/kg. What are the pressure,…

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Q: 74 kg of water is heated from 61°C to 100 C. What is the change in entropy? The specific heat of…

A: GIVEN DATA MASS OF WATER m=74kg Temprature T1 =61'C , T2=100'C Specific heat of water C=10 cal/kg.K…

Q: Calculate the internal energy and the enthalpy of 1 kg of air occupying 0.05 m³ at 20 °C at 20 bar.…

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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.