Mechanical Engineering - Thermodynamics - Discussion
Discussion Forum : Thermodynamics - Section 1 (Q.No. 6)
6.
An adiabatic process is one in which
Discussion:
49 comments Page 2 of 5.
Ravi Uttamrao Chavan said:
1 decade ago
Please apply concept of system and surrounding, the temp that is increasing is within the system and system is perfectly insulated. So there is no chances of heat interaction to surroundings.
That indicates dq = 0; So dw = -du.
That indicates dq = 0; So dw = -du.
(1)
Vishal said:
9 years ago
If there is no heat or mass transfer between system and surrounding then all the work done by surrounding is stores as a internal energy and changes in internal energy is means change in temperature.
Hence option D is correct.
Hence option D is correct.
Bibekananda mohapatra said:
1 decade ago
Answer is D.
In adiabatic process no heat enters or leave. But in adiabatic compression & expansion the temp should be changes.
As no heat added then dw = 0.
dq = du+dw.
dq = 0, dw = 0.
So du = 0.
=>du = dw.
In adiabatic process no heat enters or leave. But in adiabatic compression & expansion the temp should be changes.
As no heat added then dw = 0.
dq = du+dw.
dq = 0, dw = 0.
So du = 0.
=>du = dw.
Ananth said:
10 years ago
The given answer is wrong. Since, it is a adiabatic process there will not be any exchange of heat between system and surroundings. Then how come the temperature changes? Only the internal energy of the system changes.
Manish panjwani said:
9 years ago
Adiabatic process is the process where there is no change in internal energy of the system. Reversible adiabatic process is isentropic process means the amount of work is done is totally converted in heat.
(1)
Maniraj said:
1 decade ago
No heat enters or leaves the system by definition,
The temperature of the gas changes (possible due to internal work done).
The change in internal energy is equal to the mechanical work done (dQ=0).
The temperature of the gas changes (possible due to internal work done).
The change in internal energy is equal to the mechanical work done (dQ=0).
Bipin said:
1 decade ago
An adiabatic process is constant heat process i.e. not heat transfer will occurs, if there is no heat transfer then how the temperature will change, therefor the answer is wrong as given above.
Manjeet Kumar said:
8 years ago
The internal energy of a ideal gas is function of temperature only. So, if internal energy will change adiabatically then temperature will also change.
U= Function of T only for ideal gas.
U= Function of T only for ideal gas.
Prashanthi said:
1 decade ago
Adiabatic changes in temperature occur due to changes in pressure of a gas while not adding or subtracting any heat. In contrast, free expansion is an isothermal process for an ideal gas.
Tomichan said:
10 years ago
An adiabatic process (by definition) is one in which there is no heat exchange into or out of the system. When heat is added to a system its temperature may or may not change.
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