Thermodynamic state variables

A thermodynamic state of a system is characterized by state variables such as:

• Temperature $(T)$
• Pressure $(P)$
• Volume $(V)$
• Internal energy, entropy, etc.

These quantities depend only on the current state of the system.

What is work?

Work is not a state variable. It is a path function, meaning its value depends on the process by which the system goes from one state to another, not just on the initial and final states.

So, work does not characterize the thermodynamic state of matter.

Option-wise check

• A: Temperature — state variable
• B: Pressure — state variable
• C: Work — not a state variable
• D: Volume — state variable

Conclusion

The parameter that does not characterize the thermodynamic state of matter is: $\boxed{\text{C: Work}}$