What does “Enthalpy (H)” actually mean in Chemical Thermodynamics, and why does it matter for JEE?
the heat content at constant pressure; ΔH is negative for exothermic and positive for endothermic reactions.
In simple words: the heat content at constant pressure; ΔH is negative for exothermic and positive for endothermic reactions. Getting Enthalpy (H) clear matters because JEE questions on Chemical Thermodynamics usually test this idea directly, not just a formula you memorised.
Key point
Enthalpy (H)
Common mistake
getting the sign of ΔH the wrong way round.
Memory tip
heat released → ΔH negative; heat absorbed → ΔH positive.
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