Same chapter3 marksDifficulty: Medium
A Carnot engine works between 500 K and 300 K. Find its efficiency.
Heat and Thermodynamics
3 marksDifficulty: Medium
Distinguish between isothermal and adiabatic processes.
Original Khojo Papers practice question — not from a past board paper.
Answer
An isothermal process takes place at constant temperature, so the internal energy of an ideal gas does not change and all the heat supplied is converted into work; it must be very slow and the walls must conduct. An adiabatic process takes place with no heat exchanged with the surroundings, so any work done comes at the cost of the internal energy and the temperature changes; it must be rapid and the walls must be insulating.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The isothermal curve is less steep than the adiabatic on a P-V diagram.
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