What does “Second law of thermodynamics” actually mean in Thermodynamics & Kinetic Theory, and why does it matter for NEET?
heat flows spontaneously from hot to cold, and no engine can be 100% efficient.
In simple words: heat flows spontaneously from hot to cold, and no engine can be 100% efficient. Getting Second law of thermodynamics clear matters because NEET questions on Thermodynamics & Kinetic Theory usually test this idea directly, not just a formula you memorised.
Key point
Second law of thermodynamics
Common mistake
believing you can fully convert heat into work in a cycle.
Memory tip
some heat must always be dumped to a cold reservoir.
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