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Selina Solutions Class 9 Chemistry Solutions for Exercise Number Problems in Chapter 7 - Chapter 7 Study Of Gas Laws

Question 7 Number Problems

561 dm3 of gas at S.T.P. is filled in a 748 dm3 Container. If the temperature is constant, calculate the\ percentage change in pressure required.

Answer:

Initial volume = V1 = 561 dm3

Final volume = V2 = 748 dm3

Difference in volume = 748 - 561 = 187 dm3

As the temperature is constant,

Decrease in pressure percentage = 187 x 100/748

= 25%

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