1. An ideal gas at a pressure of 4120 kPaa and a temperature of 25 °C is contained in a cylinder with a volume of 20 m³. A certain amount of the gas is released so that the pressure in the cylinder drops to 1730 kPaa. Expansion of the gas is isentropic. The heat capacity ratio is 1.4 and the gas constant is 0.286 kJ/kg-ºC. Determine the mass of gas remaining in the cylinder, in kg.

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: An insulated piston-cylinder device contains 4.5 m3 of water with a quality equal to 0.5 at a…

A:

Q: A sealed container of 1.9 m3 volume contains 177 kg of water in the saturated liquid-vapour state at…

A: Given: Mass of water (m)=177kgVolume of water (V)=1.9m3Tsat=275°C

Q: In a capillary tube water with enthalpy equal to 1,983 kJ/kg is throttled to a pressure of 900 kPa.…

A: Given: Initial enthalpy h1=1983kJ/kgHeat loss (Q)=62kJ/kgExit pressure P2=900kPa Assumption:…

Q: A piston-cylinder device initially contains 0.4 m^3 of saturated water vapor at a pressure of 200…

A: Answer: The required voltage for the electric resistive heater is 22.3611 Volts.

Q: water contained in a closed, rigid tank, initially saturated vapor at 280 Celsius, is cooled to 100…

A: Given data:- Rigid tank means constant volume, initially saturated vapor at 280 °C and final…

Q: 1m of saturated liquid water at 200°C is expanded until its quality is 80 percent and the pressure…

A:

Q: L081-kg steam-water mixture at 1.0 MPa is contained in an inflexible tank. Heat is added until the…

A:

Q: You put a 0.5 kg piece of aluminum at 95 °C into 0.5 kg of water at 15 °C. The final temperature of…

A: Given      For Aluminium                    Mass, ma = 0.5 kg                    Specific heat, cp,a…

Q: 1.040 lbm of water fills a container whose volume is 2.040 ft3 . The pressure in the container is…

A: Mass of water (m) = 1.04 Ibm Volume of container (V)=  2.04 ft3Pressure in the container (P)= 100…

Q: The gage pressure of an ideal gas changes from 100 kPa to 200 kPa while maintaining a constant…

A: GIVEN DATA INTIAL GAUGE PRESSURE = 100KPa INTIAL VOLUME = 100L FINAL GAUGE PRESSURE =200KPa WE HAVE…

Q: Q1: A 3-m3 rigid tank contains steam at 225°C. One third of the volume is in the liquid phase and…

A:

Q: 2. A piston-cylinder device initially contains 2.4 kg saturated liquid water at 160 °C. Now heat is…

A: (a) The mass of water is given as, The initial temperature of the saturated liquid water is written…

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.