Mechanical Engineering - Thermodynamics - Discussion
Discussion Forum : Thermodynamics - Section 6 (Q.No. 12)
12.
The property of a working substance which increases or decreases as the heat is supplied or removed in a reversible manner, is known as
Discussion:
16 comments Page 1 of 2.
Vij said:
1 decade ago
Since entropy change can never be negative though as per question it is enthalpy.
Raja said:
1 decade ago
Why not enthalpy comes as a answer? Please tell me the differ between enthalpy and entropy.
Varun said:
1 decade ago
Its answer should be Enthalpy.
Because entropy change is zero in case of isotropic process, where heat interactions are involved unlike adiabatic process (no heat interactions).
As, we all know that every reversible adiabatic is isotropic but every isotropic is not reversible adiabatic. So even if the heat interaction is there, there might be no entropy change.
Because entropy change is zero in case of isotropic process, where heat interactions are involved unlike adiabatic process (no heat interactions).
As, we all know that every reversible adiabatic is isotropic but every isotropic is not reversible adiabatic. So even if the heat interaction is there, there might be no entropy change.
Santanu said:
10 years ago
In a reversible process entropy remains constant. Then how can it be the answer?
Hari said:
9 years ago
Heat addition increase in entropy and Heat rejection decrease in entropy.
Sarfaraz said:
9 years ago
Change in entropy ds = dq/T.
ds is directly proportional to dq.
ds is directly proportional to dq.
Karan said:
9 years ago
All the A, B & C options are correct because;
(a) Enthalpy is defined as the heat content in a system.
(b) According to 1st law, dQ = dU + dW.
(c) For a reversible process, dS = (dQ/T).
(a) Enthalpy is defined as the heat content in a system.
(b) According to 1st law, dQ = dU + dW.
(c) For a reversible process, dS = (dQ/T).
Rakesh said:
8 years ago
All of them are the function of temperature except entropy, so the answer is C.
Waseem said:
8 years ago
Entropy is right answer as it is directly related to heat. While other properties are dependent on temperature. Eg. If in an isothermal heat addition enthalpy of the system remain constant.
Prasanta Pal said:
7 years ago
I think it is enthalpy or internal energy.
Because as the process is done by reversible manner so it is not entropy.
Because as the process is done by reversible manner so it is not entropy.
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