For a gas mixture of

$3$

$0$

$\%$

$$nitrogen$,$

$3$

$5$

$\%$

$$hydrogen and

$3$

$5$

$\%$

$$ethane by volume, it is desired to store only

$4$

$0$

$$g of this gas mixture in a cylinder having a capacity of

$1$

$2$

$0$

$$cm

$\text{'}$

$$at a maximum temperature of

$2$

$5$

$\backslash$

deg C

$.$

$$Calculate the pressure inside the cylinder using:

i

$)$

$.$

$$Assuming that the mixture obeys the ideal gas laws. ii

$)$

$.$

$$Compressibility factor determine from the pseudo

$-$

critical point of the mixture. iii

$)$

$.$

$$SRK equation of state and iv

$)$

$.$

van der Waals equations of state.