QUESTION......

[hassam]

http://www.xtremepapers.net/CIE/Interna ... _qp_22.pdf
q(2) (ii)

 

[bibeksharma]

question not clear
which ii
a or b

 

[hassam]

b

 

[Rajendra bogati]

1.boiling occurs inside the body of liquid but evaporation occurs at the surface of the liquid.....
2 boiling occurs at constant temperature but evaporation occurs at any temperature..

 

[UxaiR]

As the Question states " ESTIMATE " that suggests that there is Not any perfect accurate answer
We just have to roughly Estimate through rough calculations

(1)
We already have calculated the volume of the cube by the formula density = mass /volume
so the volume of the Cube is 48/4.5 =10.67 Cm ^ 3

Now we also know that the Cube is made up of atoms and there are total of 6.0 x 10 ^ 23 Atoms as stated in th question
Which simply means that 6.0 x 10 ^ 23 Atoms have Made up the total volume of the cube = 10.67 Cm ^ 3
So 1 Atoms Volume would be = 10.67 / 6.0 x 10 ^ 23 = 1.78 x 10 ^-23

(2) My sir told that generally To just Estimate we have to take Cube Root of the volume occupied by 1 Atom of the cube SO
Separation = 3√1.78 x 10 ^-23

1.boiling occurs inside the body of liquid but evaporation occurs at the surface of the liquid.....
2 boiling occurs at constant temperature but evaporation occurs at any temperature..

Rajendra bogati => Hassam is not Talking about that part of the question
please Read the question number and parts Properly Before answering !