Heat and Thermodynamics 4 Question 30

32. At room temperature, the rms speed of the molecules of a certain diatomic gas is found to be 1930m/s. The gas is

(a) H2

(b) F2

(c) O2

(d) Cl2

Assertion and Reason

Mark your answer as

(a) If Statement I is true, Statement II is true; Statement II is the correct explanation for Statement I

(b) If Statement I is true, Statement II is true; Statement II is not a correct explanation for Statement I

(c) If Statement I is true; Statement II is false

(d) If Statement I is false; Statement II is true

Show Answer

Solution:

  1. vrms=3RTM

Room temperature T300K

1930=3×8.31×103×300MM=2.0g/mol or the gas is H2



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