📋 Given Parameters & Problem Setup
Process A Isothermal process
Process B Isochoric process
Process C Isobaric process
Process D Adiabatic process
Iso-thermal (constant T -> II), Iso-choric (constant V -> III), Iso-baric (constant P -> IV), Adiabatic (q = 0, no heat exchange -> I)!
1 "Thermal" refers to temperature -> Isothermal = constant temperature (A-II).
2 "Choric" refers to volume -> Isochoric = constant volume (B-III).
3 "Baric" refers to pressure -> Isobaric = constant pressure (C-IV).
4 "Adiabatic" refers to no heat exchange between system and surroundings: q = 0 (D-I).
5 Matching sequence: A-II, B-III, C-IV, D-I -> Option (2) in 5 seconds!
🛡️ Why You Can 100% Trust This Shortcut: NCERT Chemistry · Thermodynamics (Basic thermodynamic definitions and path classifications).
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Students frequently confuse isothermal (constant temperature with heat exchange allowed) with adiabatic (strictly zero heat exchange).
🛡️ How to avoid the -1 mark: Remember: In an ideal gas isothermal expansion, heat enters the system to maintain constant temperature: q = -w > 0.
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Chemistry Core Physical Chemistry · Thermodynamics Standard Benchmark
Core Scientific Principle Tested:
"Thermodynamic processes are defined by the thermodynamic variable held invariant: Isothermal (T), Isochoric (V), Isobaric (P), and Adiabatic (q = 0)."
Syllabus Focus: Types of Processes: Isothermal, Adiabatic, Isobaric, and Isochoric
Thermal is Temp, Choric is Container (Volume), Baric is Barometer (Pressure), Adiabatic has Zero Heat!
