Reversible and irreversible Processes
... Reversible process: can be defined as one whose “direction” can be reversed by an infinitesimal small change in some property of the system. “Gedankenexperiment” to picture a reversible process: ...
... Reversible process: can be defined as one whose “direction” can be reversed by an infinitesimal small change in some property of the system. “Gedankenexperiment” to picture a reversible process: ...
Nats 101 S00 #8
... of glass with a vacuum between them, or glass made with lots of air bubbles. Add insulation to the walls. This is based on that fact that different materials have different thermal conductivity. Wood feels warm, or normal, while metal usually feels cold. Actually both are at the same temperature, it ...
... of glass with a vacuum between them, or glass made with lots of air bubbles. Add insulation to the walls. This is based on that fact that different materials have different thermal conductivity. Wood feels warm, or normal, while metal usually feels cold. Actually both are at the same temperature, it ...
JIF 314 Chap 4
... and normally we have to carry out integration to determine W and Q. between two states, that is path-dependent. ...
... and normally we have to carry out integration to determine W and Q. between two states, that is path-dependent. ...
Thermodynamics - StrikerPhysics
... • Many ‘empty’ aerosol cans contain remnant propellant gases under approximately 1 atm of pressure and 20°C. They display the warning “Do not dispose of this can in an incinerator”. What is the change in internal energy of such a gas if 500J of heat is added to it, raising the temperature to 2000°F? ...
... • Many ‘empty’ aerosol cans contain remnant propellant gases under approximately 1 atm of pressure and 20°C. They display the warning “Do not dispose of this can in an incinerator”. What is the change in internal energy of such a gas if 500J of heat is added to it, raising the temperature to 2000°F? ...
WS- Specific heat
... 1. How many calories of heat are required to raise the temperature of 550 g of water from 12.0 oC to 18.0 oC? (remember the specific heat of water is 1.00 cal/g x oC) 2. How much heat is lost when a 640 g piece of copper cools from 375 oC, to 26 oC? (The specific heat of copper is 0.38452 J/g x oC) ...
... 1. How many calories of heat are required to raise the temperature of 550 g of water from 12.0 oC to 18.0 oC? (remember the specific heat of water is 1.00 cal/g x oC) 2. How much heat is lost when a 640 g piece of copper cools from 375 oC, to 26 oC? (The specific heat of copper is 0.38452 J/g x oC) ...
Heat pipe
A heat pipe is a heat-transfer device that combines the principles of both thermal conductivity and phase transition to efficiently manage the transfer of heat between two solid interfaces.At the hot interface of a heat pipe a liquid in contact with a thermally conductive solid surface turns into a vapor by absorbing heat from that surface. The vapor then travels along the heat pipe to the cold interface and condenses back into a liquid - releasing the latent heat. The liquid then returns to the hot interface through either capillary action, centrifugal force, or gravity, and the cycle repeats. Due to the very high heat transfer coefficients for boiling and condensation, heat pipes are highly effective thermal conductors. The effective thermal conductivity varies with heat pipe length, and can approach 7002100000000000000♠100 kW/(m⋅K) for long heat pipes, in comparison with approximately 6999400000000000000♠0.4 kW/(m⋅K) for copper.