Calculate Van der Waals Gas Properties

Calculates properties of a Van der Waals gas, a real gas model that includes molecular interactions and finite molecular size. Returns pressure, compressibility factor, and critical point parameters. The Van der Waals equation exhibits phase transitions and is used to model non-ideal behavior in physical and economic systems.

Use Cases:

• Model non-ideal market behavior (deviations from efficient markets)
• Phase transition modeling (market crashes, bubbles)
• Liquidity constraints (finite volume effects)
• Interaction effects between market participants
• Critical phenomena in financial systems

Formula: (P + a/V²)(V - b) = RT (for 1 mole)

Credits: 5 credits per request (Pro Tier) [Tier: ENTERPRISE, Credits: 10]

POST /quantlib/physics/thermodynamics/van-der-waals

cURL

typical_gas

curl --request POST \ --url https://api.fincept.in/quantlib/physics/thermodynamics/van-der-waals \ --header 'Content-Type: application/json' \ --header 'X-API-Key: <api-key>' \ --data ' { "a": 0.1, "b": 0.01, "n": 1, "temperature": 300, "volume": 1 } '

200

{
  "success": true,
  "data": {
    "pressure": 2471.9,
    "compressibility_factor": 0.996,
    "critical_point": {
      "T_c": 300.3,
      "P_c": 925.9,
      "V_c": 0.03
    }
  }
}

Authorizations

X-API-Key · string · header · required

API key for authentication. Get your key at https://api.fincept.in/auth/register

Body

application/json

a · number · required

Van der Waals parameter a (attractive interactions)

Example:

0.1

b · number · required

Van der Waals parameter b (excluded volume)

Example:

0.01

temperature · number · required

Temperature (Kelvin)

Example:

300

volume · number · required

Volume

Example:

1

n · number · default: 1

Number of moles

Example:

1

Response

200

application/json

Van der Waals properties calculated successfully

success · boolean

Example:

true

data · object

Show child attributes