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Adiabatic expansions of an ideal gas is accompanied by:

1. decrease in ΔE
2. increase in temperature
3. decrease in ΔS
4. no change in any one of the above properties

Correct answer: decrease in ΔE

Solution

In an adiabatic expansion of an ideal gas, the system does work on the surroundings, leading to a decrease in internal energy (ΔE) since no heat is exchanged (q = 0).

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