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In which case mean free path is not affected?
P
(1) \( \mathrm{H}_{2} \) gas at \( 100^{\circ} \mathrm{C} \) and \( 1 \mathrm{~atm} \) is transferred into a
W vessel at \( 50^{\circ} \mathrm{C} \) and \( 0.5 \mathrm{~atm} \)
(2) \( \mathrm{O}_{2} \) gas at \( 200 \mathrm{~K} \) and 2 atm is transferred into a vessel at \( 400 \mathrm{~K} \) and \( 1 \mathrm{~atm} \)
(3) \( \mathrm{O}_{2} \) gas is replaced by \( \mathrm{H}_{2} \) gas keeping other variables constant
(4) Medium is made more viscous
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