Question

The two bulbs of volume $5$ litre and $10$ litre containing an ideal gas at $9atm$ and $6atm$ respectively are connected. What is the final pressure in the two bulbs if the temperature remains constant ?

• A. $15atm$
• B. $7atm$
• C. $12atm$
• D. $21atm$

Answer 1

Answer: (B)

$7atm$

Given :

P1 = 9atm

V1 = 5L

P2 = 6atm

V2 = 10L

According to given question,

$P_1{V}_1+P_2{V}_2=P(V_1+V_2)$

$\left(9\right)\left(5\right)+\left(6\right)\left(10\right)=\left(15\right)\left(P\right)$

$105/15=P$

Final pressure,$P=7$atm

Hence the correct option is B.