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

instrument / verified-clean

# Ideal Gas Law Solver

The current ledger marks this instrument verified clean within the source-bound verification corpus.

Status: **VERIFIED_CLEAN**Lifecycle: **verified-clean**

## Inspectable records

[01**Overview**Purpose and lifecycle](<https://guthlabs.ai/docs/instruments/ideal-gas-law-solver/>)[02**Mechanism**Method and assumptions](<https://guthlabs.ai/docs/instruments/ideal-gas-law-solver/mechanism/>)[03**Implementation**Binding and validation](<https://guthlabs.ai/docs/instruments/ideal-gas-law-solver/implementation/>)[04**Qualification**Evidence and errata](<https://guthlabs.ai/docs/instruments/ideal-gas-law-solver/qualification/>)

## Ledger state

The current ledger marks this instrument verified clean within the source-bound verification corpus.

**Area**: Thermodynamics & Energy

**Tranche**: calibration-1

**Evidence ID**: offline/source boundary

**Ledger rows**: 1

No ledger note is attached.

## Review findings

The core formulas are standard under the stated assumptions, but the undefined 'R or M' gas-selection behavior and missing absolute-unit constraints require clarification before an unqualified PASS verdict.

### Formula and scope findings

- PV=nRT is the standard ideal-gas equation, but the input description 'gas selection (R or M)' is ambiguous: molar mass M cannot substitute for the universal gas constant R in PV=nRT. If mass and molar mass are intended, the formula must instead define n=m/M or use PV=mR_specificT with R_specific=R/M.

- P1V1/T1=P2V2/T2 is valid only for a fixed amount of the same gas, with constant n and the same gas identity in both states.

- The specification does not state that temperature must be absolute Kelvin or that pressure must be absolute rather than gauge pressure.

- The phrase 'any 3 of P, V, n, T' is incomplete without specifying the unit system and the required conversion behavior for non-SI inputs.

### Unit assumptions

- For PV=nRT with R=8.314 J/(mol·K), use P in Pa, V in m³, n in mol, and T in K; the result is dimensionally consistent.

- If pressure is supplied in atm, volume in L, or temperature in °C, those values must be converted before applying the SI-valued R.

- Temperature in both formulas must be absolute Kelvin; 0 °C equals 273.15 K, not 0 K.

- P1V1/T1=P2V2/T2 assumes absolute pressures and volumes expressed in consistent units on both sides; identical pressure and volume units may cancel in the ratio.

- The listed R=8.314 J/(mol·K) is a rounded value, so outputs should be treated as rounded to appropriate significant figures.

## Boundary hardening

**BREAK_CLAIMED** · SELF_FLAGGED

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.

## Errata and corrections

No applied erratum is attached to this unique-name record.

## Inspectable example

4 review vectors are recorded. One source-bound sample is shown below.

````
{
  "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."
}
````

## Related workflows

No source-defined multi-instrument workflow membership is recorded.

## Sources and evidence

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

- `VERIFIED_LEDGER.json · VERIFIED_CLEAN`

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

- `BOUNDARY_HAZARD_CATALOG.json`