A balloon filled with helium

A balloon filled with helium $\left(32^{\circ} \mathrm{C}\right.$ and $\left.1.7 \mathrm{~atm} .\right)$ bursts. Immediately afterwards the expansion of helium can be considered as :

  1. irreversible isothermal

  2. irreversible adiabatic

  3. reversible adiabatic

  4. reversible isothermal

Correct Option: , 2


(2) Bursting of helium balloon is irreversible and in this\

process $\Delta Q=0$, so adiabatic.


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