A closed rigid tank initially contains 1 kg of air at 30 C. 91 kJ of heat is then added slowly to the air. Given that C, and C, of the air 0.7 kJ/kg.K, and 1.0 kJ/K, are respectively. Calculate the final temperature (in C) of the air.

Q: One kg. of gas is confined to a constant volume tank. Initial pressure and volume are 4 0.21m3…

A: Given that,  Q=82 kJ,  p1=4 barm=1 kg,  V1=0.21 m3 Final temperature, T2=127oC

Q: 7. At a certain process, the specific heat at polytropic process of air is 0.3075kJ/kg- k. Under the…

A: Given data  specific heat at polytropic process (C) = 0.3075 kJ/kg-K  final pressure = 200 kPaa At…

Q: 500 J/(Kg. C), is The quantity of heat required to raise the temperature of 500 g of iron by 2°C…

A: As given in question, Mass of iron = m = 500 g = 0.5 kg Change in temperature = ΔT = 2 oC Specific…

Q: A gas is compressed from an initial volume of 5.75 LL to a final volume of 1.24 LL by an external…

A:

Q: Consider an air conditioning system which requires periodic air renewal. Therefore, fresh air must…

A:

Q: In a piston-cylinder assembly, there is initially 2 kg of water at a temperature of 25 °C and a…

A: Write the given data:

Q: A gas is transferred to an empty 0.7m3 cylinder until the pressure reaches 9MPaa. The temperature of…

A: Given question belongs to subject Engineering thermodynamics. Which can be solved by Ideal-Gas…

Q: 1. A scuba tank contains 1.5 kg of air. The air in the tank is initially at 15 C. The tank is left…

A: Given Data: Mass of air: 1.5 kg The initial temperature of air: 15C+273=288 K Let the initial…

Q: The fuel consumption of an automobile is 14 km/ L.The fuel consumption, in miles per gallon, is?

A: Given: The fuel consumption of an automobile is V=14 km/L.   The unit conversion factor from…

Q: Water at 150 kPa and 4 kg of saturated liquid vapor mixture is in a piston-cylinder assembly. 3 kg…

A: Steam in general can exits different phases as subcooled liquid, saturated liquid, saturated wet…

Q: Find the density for air at 230 kPa and 500 K. A. 0.624 kg/m3 B. 1.60 kg/m3 C. 2.45 kg/m3 D. 12.8…

A: Given, Air pressure = 230KPa Air temperature = 500K   to determine: density

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

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

Q: A 5-kg block of copper is heated from -100°C to 100°C. Determine the change of internal energy of…

A:

Q: A piston-cylinder device initially contains 0.8m3 of saturated water vapor at 250 kPa. At this…

A: (a)The known quantities for initial state are as follows:Volume, V1 = 0.8 m3.Pressure, P1 = 250…

Q: ystem decreases by 700 kJ/kg during this process and 200 kJ/kg of boundary work is done on the…

A:

Q: A piston-cylinder contains nitrogen initially at 100 kPa, 20°C, and a volume of 0.283 m³ (State 1).…

A:

Q: 10 kg gas is contained in a vertical piston–cylinder assembly by a piston weighing 40 Kg and having…

A:

Q: Solution: i) Change in Temperature (in K) ii) Mass of the saltwater (in kg) iii) Quantity (Volume)…

A:

Q: ideal gas with a molecular mass of 32 is contained in an inflexible tank. It is heated from 244.32…

A:

Q: A substance initially at 67kPa, 58 m³ is compressed to 167 kPa in a process where PV=const., n =…

A:

Q: 500 J/(Kg.°C), is The quantity of heat required to raise the temperature of 500 g of iron by 2C…

A: From the given data, Mass of iron = m = 500 g = 0.5 kg Change in temperature = ΔT = 2 oC Specific…

Q: 40 m3 of air (R=0.287), at a gage pressure of 20kPa, and a temperature of 27 °C, then the specific…

A: Given 40 m3 of air (R=0.287), at a gage pressure of 20kPa, and a temperature of 27 °C To determine…

Q: Oxygen (molar mass 32 kg/kmol) expands reversibly in a cylinder behind a piston at a constant…

A:

Q: Deduce for the case of a perfect gas the relationship between the gas constant and the specific…

A: Relation between CP ,Cv and R CP-Cv=R   (Mayer's Relation) γ=CPCV

Q: 500//(Kg.°C), is: The quantity of heat required to raise the temperature of 500 g of iron by 2°C…

A: Given:mass of iron, m=500 gIncrease in temperature, ∆T=2°Cspecific heat of iron, Cp=500 J/Kg.°C

Q: In the air conditioning process in the humidifier, air at a dry bulb temperature of 30 degrees C and…

A:

Q: H.W: - 0.8m of gas at 8bar and 27°C is compressed isothermally until its volume is 4 time the…

A:

Q: 1 - Consider 2 kg of water in a cylinder blocked by a piston at 20 C, 200 kPa. Water is heated and…

A: The mass of water is m=2 kg. The initial pressure on the piston is P1=200 kPa. The initial…

Q: A high altitude chamber chamber , the volume of which is 30m3 , is put into operation by reducing…

A:

Q: wer 2. Ammonia weighing 22 kgs is confirmed inside a cylinder equipped with a piston has an initial…

A:

Q: According to Newton’s law of cooling, the rate at which the temperature of an object changes is…

A: Write the given data with suitable variables. To=200 °CTs=70 °CT1=120 °CT2=100 °Ct2=10 min

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.