The average molecular speed is greatest in which of the following gas samples ?
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a
1.0 mol of O2 at 560 K
b
0.50 mol of Ne at 500 K
c
0.20 mol of CO2 at 440 K
d
2.0 mol of He at 140 K
answer is D.
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Detailed Solution
Average molecular speed = 8RTπM is dependent on T and MThus, greater the value of TM, the greater is the molecular speed. calculate TM for given options For O2 = 56032 = 4.18,Ne = 50020=5.0, CO2=44044=3.16, He = 1404= 5.91