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The apparatus shown consists of three bulbs connected by stop clocks. What is the pressure inside the system when stop clocks are opened. Assume that the lines connecting the bulbs have zero volume and
that the temperature remains constant. (Assume ideal nature for gases)

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2.65

1.41

3.52

7.6

answer is C.

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Detailed Solution

As per gas laws

$P_{total} = \frac{P_{1} V_{1} + P_{2} V_{2} + P_{3} V_{3}}{V_{1} + V_{2} + V_{3}}$

$V_{total} = V_{1} + V_{2} + V_{3}$

=1.50+1.0+2.0

=4.5 L

$V_{mix} P_{mix} = P_{1} V_{1} = 2.13 \times 1.50 = 3.195$

$= P_{2} V_{2} = 0.861 \times 1.0 = 3.195$

$= P_{3} V_{3} = 1.15 \times 2.0 = 2.3$

$P_{mix} = \frac{3.19 + 0.861 + 2.3}{4.5}$

$= \frac{3.356}{4.5} = 1.41$

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