A computer in a closed room of volume 200 m³ dissipates energy at a rate of 5 kW. The room has 500 kg of wood, 45 kg of steel, and air, with all material at 300 K and 100 kPa. Assuming all the mass heats up uniformly, how long will it take to increase the temperature 10°C?

Q: Many gyms and health clubs have steam saunas, which are small steam-filled rooms. Traditionally,…

A: Steam saunas is a device to generate the steam at constant rate in a room and this steam can be…

Q: A piston-cylinder arrangement contains 2kg of steam origionally at 200C and 90% quality. Calculate…

A: Given : Mass of steam, m = 2 kgtemperature of steam, T = 200 °Cquality of steam, x = 90% = 0.9Since…

Q: 3) A frictionless piston-cylinder device contains 3 m3 of a gas at 200 kPa and 300 K. The gas is now…

A:

Q: Calculate the boundary work done by the system during this process

A:

Q: In the interior of a piston that can move freely, there is initially 2 kg of R-134a refrigerant in…

A:

Q: n adiabatic rigid steam tank has expansion valve. Initially, steam is at 1MPa and 350C. Suddenly,…

A:

Q: Steam enters a turbine at 3 MPa and 600 C and leaves at 100 kPa and 100 C. In the process, it losses…

A: Given At turbine inlet P1=3MPaT1=600oCAt turbine outletP2=100 kPaT2=100oCQ=-150 kWm˙=2 kg/s

Q: 20 kg of steam contained in a high-pressure tank. Tank is isolated, but heat loss to the surrounding…

A:

Q: A gas cylinder with interior volume 11.6 L holds compressed air at 17.4 MPa. The cylinder is joined…

A: Given: Volume of the gas cylinder: →V1=11.6 L=0.0116 m3 Pressure in the gas cylinder: →P1=17.4 MPa…

Q: R-410A

A: V=10l=.01m3T1=-10oCx1=.8T2=40oCWe=36kJ/kg from the R140 saturation table at T1=-10oC…

Q: Consider a closed piston cylinder that contains 0.2 kg of superheated water vapor at 200C and…

A:

Q: 4-40 Steam at 75 kPa and 8 percent quality is contained in a spring-loaded piston-cylinder device,…

A: Initial State,P1 = 75 kPa,   Volume = 2 m3,     Quality = 8%  or  X = 0.08,Final State,P1 = 225 kPa,…

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.