Mechanical Engineering - Thermodynamics - Discussion

Discussion Forum : Thermodynamics - Section 1 (Q.No. 6)
6.
An adiabatic process is one in which
no heat enters or leaves the gas
the temperature of the gas changes
the change in internal energy is equal to the mechanical workdone
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
49 comments Page 5 of 5.

Muthamizh Selvan said:   1 decade ago
What is the relationship between internal energy and temperatures?

Saravanakumar said:   1 decade ago
@Muthamizh Selvan There is one.

Q = Del E + Del W.

Del E = dU+ dE, here dU is the heat produced due to work. So there is heat energy is induced inside the system, there the temperature will changes. Still there is no heat transfer across the boundary, Since the process is adiabatic.

Del W = Del W.

Aarti Mirge said:   1 decade ago
As per second law of thermodynamics, dQ=TdS, in adiabatic process dS=0, so dQ=0.

And hence dU=-dW, i.e, work is done on account of internal energy and as internal energy is a function of temperature for an ideal gas so temp will change although there is no heat transfer in adiabatic process.

Divakar mishra said:   1 decade ago
Because in the adiabatic process dq=0 then t=c.

Irfan Ansari said:   1 decade ago
As it is an adiabatic process so, no heat enters or leaves the system.

Dq = du+dw.

O = du = 0.

Sahebagou,Mallappa said:   1 decade ago
The answer is correct because temperature variation takes place inside the system. Any way it won't transfer to outer area hence it has sealed.

Siddharth said:   1 decade ago
If temperature of gas changes then how can be this process called adiabatic process?

Mohamed alaarag said:   1 decade ago
How can we call it adiabatic process and the temperature change?

Krishan said:   1 decade ago
In adiabatic process no heat enter and lease system then work done by or on the system is zero.

dQ=0 then dW=0 As per first law of thermodynamics.


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