(a) What is the value of PV/T where the curves meet on the -axis?

(b) If we obtained similar plots for kg of hydrogen, would we get the same value of PV/T at the point where the curves meet on the y-axis? If not, what mass of hydrogen yields the same value of PV/T (for low pressure high temperature region of the plot)? (Molecular mass of , of

Solution:

(a) We will use

Mass of the gas is given as

Molecular mass of is given as

So,

Number of mole given weight / molecular weight

So,

So,

Value of

(b) of does not represent the same number of mole.

For Example, molecular mass of is

So, number of moles of require is

Therefore,

Mass of required = no. of mole of molecular mass of

As a result, of would yield the same value