Question

The equilibrium state of a thermodynamic system is described by:
A. Pressure
B. Total heat 
C. Temperature 
D. Volume 
E. Work done
Choose the answer from the options given below.

• A. A, B and E only
• B. B, C and D only
• C. A, B and C only
• D. A, C and D only

Answer 1

The Correct Option is D

The question is about identifying which parameters describe the equilibrium state of a thermodynamic system. Let's analyze each listed parameter to ascertain their relevance to a thermodynamic system in equilibrium:

• Pressure (A): In thermodynamics, the equilibrium state of a system, often a gas or fluid, is significantly described by its pressure. Pressure remains constant in a closed system at equilibrium.
• Total Heat (B): Total heat, or internal energy, is a state function but does not solely describe an equilibrium state. Instead, it is a factor resulting from reaching equilibrium.
• Temperature (C): Temperature is another crucial parameter for the equilibrium state of a thermodynamic system. In equilibrium, the temperature is uniform throughout the system.
• Volume (D): Volume denotes the space occupied by the system and is an intrinsic property describing its equilibrium state along with pressure and temperature.
• Work Done (E): Work done is a process-dependent function and not a state function. It does not define the equilibrium state but is instead affected by changes in state.

Based on this examination:

• A. Pressure, C. Temperature, and D. Volume are the parameters that describe the equilibrium state of a thermodynamic system. These parameters are fundamental and intrinsic properties capable of describing an equilibrium state.

Therefore, the correct answer is A, C, and D only.