Source: https://guthlabs.ai/docs/instruments/ideal-gas-law-solver/implementation/

instrument implementation / implementation-contract

# Ideal Gas Law Solver implementation

A source-bound implementation contract for Ideal Gas Law Solver; deployment and executable qualification remain separate.

Status: **VERIFIED_CLEAN**Lifecycle: **implementation-contract**

## 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**: live-source boundary

**Effect**: Computation or source lookup only

## Input and validation requirements

The solver should reject T=0 K as outside the ideal-gas validity range and reject n=0 when solving T because the denominator nR vanishes. A convention error also produces a severe numerical error when Celsius is treated as Kelvin.

## 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": {
    "solve_for": "n",
    "P": 100000,
    "P_unit": "Pa",
    "V": 0.024942,
    "V_unit": "m^3",
    "T": 300,
    "T_unit": "K",
    "R": 8.314,
    "R_unit": "J/(mol·K)"
  },
  "expected_outputs": {
    "n": 1,
    "n_unit": "mol"
  },
  "working": "n=PV/(RT)=(100000 Pa×0.024942 m^3)/(8.314 J/(mol·K)×300 K)=2494.2/2494.2=1 mol."
}
````

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/ideal-gas-law-solver/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/ideal-gas-law-solver/mechanism/>)[04**Qualification**](<https://guthlabs.ai/docs/instruments/ideal-gas-law-solver/qualification/>)

## Sources and evidence

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

- `VERIFIED_LEDGER.json`

- `evidence-tranche2/batch10-output.jsonl`