Question

A flexible container at an initial volume of
3.10
L
contains
5.51
mol
of gas. More gas is then added to the container until it reaches a final volume of
18.1
L
.
Assuming the pressure and temperature of the gas remain constant, calculate the number of moles of gas added to the container.

Answer 1

Initial conditions : $V_i=3.1L;n_i=5.51mol$

Final conditions : $V_f=18.1 L; n_f=?$

As pressure and temperature remain constant;

$V_i/V_f=n_i/n_f$

$\implies n_f=V_fn_i/V_i$

$=18.1*5.51/3.1$

$=32.17 mol$ (Answer)