Q. The van der Waals equation for real gases is: (P + a/V²)(V - b) = RT. The constant 'a' accounts for:
वास्तविक गैसों के लिए वैन डेर वाल्स समीकरण है: (पी + ए/वी²)(वी - बी) = आरटी। स्थिरांक 'ए' इसके लिए जिम्मेदार है:
Explanation
In the van der Waals equation: (P + a/V²)(V - b) = RT
The constant 'a':
- Accounts for intermolecular attractive forces
- Corrects for the reduction in pressure due to molecular attractions
- Larger 'a' values indicate stronger intermolecular forces
- Units: atm·L²/mol²
The constant 'b':
Accounts for molecular volume (excluded volume)
Represents the finite size of gas molecules
The term a/V² is added to pressure because attractive forces reduce the observed pressure below the ideal value.
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