x A ALEKS-Learn - Rheagan Brye x C Rank The Samples Of Gas Des c secure aleks.co

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x A ALEKS-Learn - Rheagan Brye x C Rank The Samples Of Gas Des c secure aleks.com/alekscgik/isl.exe/1o.u-gNskr718P3/H-1BIKFdvJdkR4QgoFuFbLE9JHQJOYSYezxnzjhTArEo65SnucbvWd6AM O GASES Understanding how average molecular speed scales with temper.. Rank the samples of gas described in the table below in order of increasing average speed of the atoms or molecules in them. That is, select "1" next to the sample in which the atoms or molecules have the slowest average speed. Select "2" next to the sample in which the atoms or molecules have the next slowest average speed, and so on. average speed of atoms or molecules gas sample 2.5 mol of neon gas at 1.7 atm and-37·°C 1.5 mol of argon gas at 1.8 atm and-37. oC 2.8 mol of neon gas at 2.9 atm and-15. 2.3 mol of neon gas at 1.1 atm and-26. (Choose one) (Choose one) (Choose one) (Choose one): Check 2017 McGraw-Hill Education All Rights Reserved Terms of Use I 17

Explanation / Answer

Kinetic energy of molecules is only dependent upon temperature and inturn , the velocity will follow the same as:

K.E = 1/2mv2 = 3/2 nRT

v = root(3nRT/m)

n = no. of moles = m/M  

m = mass of molecules

M = molar mass

replacing in

v = root(3RT/M)

higher is the temperature , more is the velocity and it also depends upon molar mass of gas more is molar mass ,less is velocity

1. Ar(M = 40) at - 37 oC

2.Ne(M=20) at -37 oC

3.Ne at -36 oC

4. Ne at -15 oC

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