Nernst Equation Calculator implementation

Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

Record owner

Guth Instruments

Lifecycle

verified-clean

Evidence ID

t4-265

Effect

Computation or source lookup only

Input and validation requirements

The input n=0 produces division by zero in the Nernst correction term, so the calculator must reject it rather than return a numeric potential. The specification does not state an explicit validation rule for this case.

Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

{
  "inputs": {
    "E°_V": 1.1,
    "n": 2,
    "Q": 0.01,
    "T_K": 298.15,
    "formula": "E=E°-(RT/nF)ln Q"
  },
  "expected_outputs": {
    "E_V": 1.15916
  },
  "working": "R T/F = (8.314462618 J mol^-1 K^-1 × 298.15 K)/(96485 C mol^-1) = 0.02569267 V. Therefore RT/(nF)=0.02569267/2=0.01284633 V. ln(0.01)=-4.60517019. E=1.10-(0.01284633×-4.60517019)=1.10+0.05915955=1.15915955 V, approximately 1.15916 V."
}

Other records

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json
• evidence-tranche4/tranche4-results.json