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What is free expansion in thermodynamics?
In free expansion, the external pressure is zero, i.e. work done is zero. Accordingly, free expansion is also called irreversible adiabatic expansion.
Why carnot cycle is called a two adiabatic and two isothermal process?
Adiabatic means there's no heat transference during the process; Isothermal means the process occurs at constant temperature. The compression and expansion processes are adiabatic, whereas the heat transfer from the hot reservoir and to the cold reservoir are isothermal. Those are the two adiabatic and isothermal processes.
Is entropy of adiabatic compression increase or decrese?
entropy of system for a reversible adiabatic process is equal to zero. entropy of system for a irreversible adiabatic process (like free expansion) can be achieved by the following formula: Delta S= n Cp ln(V2/V1) + n Cv ln (P2/P1)
Is isothermal expansion reversible under ideal conditions?
No. All processes involving heat transfer are not reversible, since they result in an increase in entropy. Isothermal expansion implies heat transfer to maintain the system at a constant temperature. Normally an expanding gas would cool if there were no heat entering the system. Adiabatic processes involve no heat transfer and are reversible. The temperature can (and usually does) change during an adiabatic process.
Explain the Difference between adiabatic and isothermal compression?
"Adiabatic process" refers to processes that take place in a closed system with no heat interaction with it's surroundings. "Isentropic process" refers to processes that take place in a closed system with no heat interaction with the surroundings (adiabatic process) and internally reversible. This is, no internal generation of entropy, entropy stays constant, which is what is meant by "isentropic". We can also say, an isentropic process is one where entropy stays constant, and no heat interaction of the system with the surroundings takes place (adiabatic process). Or, an adiabatic process can be irreversible, or reversible (isentropic).
What is steam temperature after adiabatic expansion?
lower
What is cooling of air expansion caused by?
adiabatic cooling
Why does gas inside a cylinder cool when subjected to adiabatic expansion?
because while cooling of gas in adiabatic expansion process , as it is a reversible procces the heat is lost while reversible work
Which thermodynamic process gives maximum work?
Reversible adiabatic expansion/compression
What happens when adiabatic expansion of gas molecules occurs?
The temperature of the gas decrease.
Changes in temperature that result solely from the expansion or compression of air are called?
adiabatic
What is free expansion in thermodynamics?
In free expansion, the external pressure is zero, i.e. work done is zero. Accordingly, free expansion is also called irreversible adiabatic expansion.
Where is the Expansion device on a refrigeration system?
on the bottom
Why carnot cycle is called a two adiabatic and two isothermal process?
Adiabatic means there's no heat transference during the process; Isothermal means the process occurs at constant temperature. The compression and expansion processes are adiabatic, whereas the heat transfer from the hot reservoir and to the cold reservoir are isothermal. Those are the two adiabatic and isothermal processes.
What are the condition for ideal fluid?
1.Isothermal expansion at a high temperature AB 2.Adiabatic expansion as the temperature falls to a lower rule BC 3.Isothermal compression at lower temperature CD 4.Adiabatic compression as temperature increase to initial high volume DA
When a gas undergoes adiabatic expansion it gets cooled due to?
It gets cooled because the internal energy of the system decreases.
What is the refrigerant entering the metering or expansion device of a refrigeration system?
superheated vapor
