Ideal Gas Law Solver

Inspectable records

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