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Chemistry · THERMODYNAMICS
हिन्दीAn ideal gas expands from \( 2\text{ L} \) to \( 10\text{ L} \) against a constant external pressure of \( 1\text{ atm} \) at \( 25^\circ\text{C} \). The amount of heat absorbed by the system from the surroundings is:
Correct answer · Option 1
\( 8\text{ litre-atm} \)
Explanation
For isothermal expansion of an ideal gas, \( \Delta U = 0 \implies q = -w = p_{\text{ex}}(V_f - V_i) = 1\text{ atm} \times (10 - 2)\text{ L} = 8\text{ L atm} \).
