Source: https://guthlabs.ai/docs/instruments/van-der-waals-real-gas-calculator/qualification/

instrument qualification / verified-with-binding-errata

# Van der Waals Real-Gas Calculator qualification

Verified with errata that must be applied at binding time.

Status: **VERIFIED_WITH_ERRATA**Lifecycle: **verified-with-binding-errata**

## Ledger verdict

Verified with errata that must be applied at binding time.

**Status**: VERIFIED_WITH_ERRATA

**Tranche**: tranche-6

**Review vectors**: 4

**Ledger rows**: 1

## Applied errata

````
[
  {
    "vector": "1,4",
    "field": "corrected_pressure / pressure_percent_deviation",
    "wrong": "2.42579 atm / -1.45915% (and SI twin 245793.9 Pa)",
    "correct": "2.436339 atm / -1.03062% (SI 246862.8 Pa / -1.03078%)",
    "cause": "output uses nRT/V - a(n/V)^2 — the volume-exclusion b correction is dropped — while her own working computes nRT/(V-nb)=2.47254 correctly; systematic across both unit systems"
  }
]
````

## Adversarial re-test context

The full catalog was re-tested from boundary, convention, and self-check angles in 2,787 requests. Five genuine computational defects were independently verified and corrected. This page reports the current ledger state for this instrument; it does not imply product deployment or interface qualification.

## Release gate

Bind every attached correction, replay the affected vectors, enforce boundary validation, and preserve evidence before describing the executable surface as qualified.

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/van-der-waals-real-gas-calculator/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/van-der-waals-real-gas-calculator/mechanism/>)[03**Implementation**](<https://guthlabs.ai/docs/instruments/van-der-waals-real-gas-calculator/implementation/>)

## Sources and evidence

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

- `VERIFIED_LEDGER.json`

- `STRESS_TEST_RECEIPT.json`

- `tranche errata record`