$\Delta U = n C_v \Delta T$ Internal Energy Change (Temperature) 2024 Apr E, 2023 Apr M, 2023 Apr E, 2022 Jul M, 2022 Jul E, 2022 Jun M, 2022 Jun E, 2021 Mar E, 2021 Feb M, 2019 Jan M, 2019 Apr E 12 🔥🔥🔥 $\Delta G^\circ = \Delta H^\circ - T\Delta S^\circ$ (Standard Gibbs Free Energy) Standard Gibbs Free Energy 2024 Apr E, 2023 Apr M, 2023 Apr E, 2022 Jul M, 2022 Jul E, 2022 Jun M, 2022 Jun E, 2021 Mar E, 2021 Feb M, 2019 Jan M, 2019 Apr E 12 🔥🔥🔥 $\Delta S = n C_v \ln(T_2/T_1) + n R \ln(V_2/V_1)$ (General Entropy Change) Entropy Change (General) 2024 Apr E, 2023 Apr M, 2023 Apr E, 2022 Jul M, 2022 Jul E, 2022 Jun M, 2022 Jun E, 2021 Mar E, 2021 Feb M, 2019 Jan M, 2019 Apr E 12 🔥🔥🔥 $\Delta G_{reaction} = \Sigma \Delta G_f^{products} - \Sigma \Delta G_f^{reactants}$ Gibbs Free Energy from Formation Data 2024 Apr E, 2023 Apr M, 2023 Apr E, 2022 Jul M, 2022 Jul E, 2022 Jun M, 2022 Jun E, 2021 Mar E, 2021 Feb M, 2019 Jan M, 2019 Apr E 12 🔥🔥🔥

📘 TASK 2 — STATEMENT & TRAP PATTERN DATABASE

Statement Patterns

Pattern Type	Concept Targeted	Hidden Trap Logic	Typical Wrong Assumption	JEE Recycling
Assertion-Reason (Q8, Q55)	Enthalpy of Neutralization, Spontaneity & Phase Changes	Relating microscopic definition to macroscopic value; effect of phase change on $\Delta G^\circ$ and entropy.	Assuming $\Delta H_{neut}$ is always exactly $-57 \text{ kJ/mol}$ for weak acids/bases; ignoring entropy contribution to $\Delta G^\circ$ for non-standard conditions or phase changes.	YES, frequently recycles A/R on fundamental definitions and conditions for spontaneity.
Identify Incorrect Statement (Q19, Q77, Q116)	Conditions for Spontaneity ($\Delta G$), Thermodynamic Relations, First Law of Thermodynamics	Misinterpreting conditions for spontaneity (e.g., $\Delta G > 0$ for non-spontaneous); incorrect thermodynamic relations (e.g., $\Delta U = q - w$ vs $\Delta U = q + w$).	Confusion between $\Delta G$ and $\Delta G^\circ$; sign conventions for work and heat; misremembering specific thermodynamic equations.	YES, frequently tests understanding of fundamental thermodynamic definitions and relations.
Choose Correct Option (Q13, Q46, Q67, Q105, Q109)	Free Expansion, Thermodynamic Relations, State Functions vs Path Functions, Process characteristics	Distinguishing between state and path functions; specific conditions for free expansion ($\Delta U = 0, q = 0, w = 0$); correct algebraic relationships between thermodynamic quantities.	Mixing up state and path functions; misunderstanding the definition of free expansion; incorrect sign conventions or variable dependencies.	YES, highly recycled for testing foundational concepts of thermodynamics.

📊 TASK 3 — YEAR × SHIFT MICRO-ANALYSIS

Analysis Summary

JEE Main consistently tests Thermodynamics core concepts. There's no significant variation in question types or difficulty across shifts within a single year. However, some topics show higher