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MDCAT Chemistry
QUESTION #7789
Question 1
Work done (in atm·dm³) when 1 mol ideal gas expands from 15 dm³ to 20 dm³ against constant external pressure 2 atm:
Correct Answer Explanation
\(W = -P_{\text{ext}} \Delta V = -2 \times (20-15) = -2 \times 5 = -10\ \mathrm{atm·dm³}\). Negative sign indicates work done by the system (expansion).
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