## Problem 094 — rank:137

**Title:** Mechanochemical coupling

**Added binding assumptions (LaTeX):**

```latex
Sum over ordered allowed transitions, with $n_{ji}=-n_{ij}$ and $d_{ji}=-d_{ij}$, so reverse events supply the negative current contributions. Specify all chemical reservoirs; omitted fuels invalidate the entropy budget. At stationarity the internal-energy contribution cancels and $\sigma$ is dimensionless entropy production per unit time, not total accumulated entropy.
```

**Direct edits:** 0. **Fresh external checks:** None; supplied sources retained as provenance.