Question

If 20cm³ gas at 1 atm. is expanded to 50cm³ at constant T, then what is the final pressure?

Answer 1

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➡(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.

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