Question

If 20 cm3 gas at 1 atm. is expanded to 50 cm3
constant T, then what is the final pressure ?
(a) 20x1÷50
(b) 50×1÷20
(c) 1x1÷20×50
(d) none of these.
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Answer 1

Answer:

a

Explanation:

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Answer 2

Answer:

(a). 20 × 1 ÷ 50

Explanation:

As we that how to find the final pressure, by using the formula of finding the final pressure is as follows as:

pV = nRT

where T is the constant of proportionality.

Here,

p1 = Initial pressure

p2 = Final pressure

V1 = Initial volume

V2 = Final volume

=> p1V1 = p2V2

=> p2 = p1V1 / V2

=> p2 = 1 × 20 / 50

=> p2 = 20 / 50

=> p2 = 2/5

=> p2 = 0.4

Therefore, the final pressure is 0.4 bar.