How Does Surface Tension Affect Thermodynamic Potentials in Soap Bubbles?

AI Thread Summary
The discussion focuses on the impact of surface tension on thermodynamic potentials in soap bubbles, specifically through the differential work expression dW = −pdV + γdA. Participants are asked to compute new differential expressions for the internal energy (U), enthalpy (H), Helmholtz free energy (F), and Gibbs free energy (G), along with identifying their new natural variables. The conversation also touches on the potential existence of new Maxwell relations resulting from these changes. Clarification is sought regarding the context of the problem, which is revealed to be a revision of a past exam paper rather than a homework assignment. The discussion emphasizes the importance of understanding the role of surface tension in thermodynamic calculations.
Zero-shift
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For a system modelling a soap bubble, the differential work done is now given by:

dW = −pdV + γdA, where γ is the surface tension and A the area. Compute new differential expressions for the potentials U, H, F, G. What are the new natural variables in each case? Are there any new Maxwell relations?
 
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Hi Zero. This looks like a homework problem, can you provide more context as to where the problem is sourced from, and what you've already done to try and solve it?
 
not homework, Its revision of past exam paper.
 

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