What is the most highly populated rotational level of Cl2 (i) 25deg C and (ii) 100 deg C? Take B=0.244cm-1.This question should not be resubmitted, it is a textbook question from the Atkins physical chemistry txtbook. 10 e.

i

ii

Explanation:

From the question we are told that

  The first temperatures is

   The second temperature is  

Generally the equation for  the most highly populated rotational energy level is mathematically represented as

Here R is the gas constant with value

Also  

      B is given as

   Generally the energy require per mole to move 1 cm is  12 J /mole

So    will require x J/mole

=>          

So at the first temperature

=>  

So at the second temperature

=>  

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

56 moles of   lieter in chemistry