If 1 L of gas A at 600 torr and 500 mL of gas B at 1000 torr are placed in 2 L flask, the final pressure will be

Question

If 1 L of gas A at 600 torr and 500 mL of gas B at 1000 torr are placed in 2 L flask, the final pressure will be (A) 500 torr (B) 550 torr (C) 1000 torr (D) 1100 torr

Tardigrade Admin · Accepted Answer

The partial pressure of gas A =(P1 V1/V2)=(600 text torr × 1000 mL /2000 mL )=300 text torr Similarly partial pressure of the gas B=(1000 text torr × 500 mL /2000 mL )=250 torr So total pressure of the mixture =300 torr +250 torr =550 torr.

Q. If $1 L$ of gas $A$ at $600$ torr and $500 m L$ of gas $B$ at $1000$ torr are placed in $2 L$ flask, the final pressure will be

500 torr

550 torr

1000 torr

1100 torr

The partial pressure of gas $A$
$= \frac{P _{1} V _{1}}{V _{2}} = \frac{600 torr \times 1000 m L}{2000 m L} = 300 torr$
Similarly partial pressure of the gas $B = \frac{1000 torr \times 500 m L}{2000 m L} = 250$ torr
So total pressure of the mixture $= 300$ torr $+ 250$ torr $= 550$ torr.

Q. If 1L of gas A at 600 torr and 500mL of gas B at 1000 torr are placed in 2L flask, the final pressure will be