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100.0 mL of gas is placed into a syringe, what is the new volume if....? A)the pressure...

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layn | Student, Undergraduate | eNotes Newbie

Posted December 3, 2008 at 6:59 AM via web

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100.0 mL of gas is placed into a syringe, what is the new volume if....?

A)the pressure is doubled?

b)the pressure is tripled?

C)the pressure is one quarter the orginal pressure?

pl i need this answers for today pl thank you

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lynn30k | High School Teacher | (Level 3) Associate Educator

Posted December 3, 2008 at 7:43 AM (Answer #1)

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Boyle's law states that:

P1V1=P2V2    P is pressure, V is volume.  In other words, as pressure goes up, volume goes down.

For A., P1 (100ml) = 2 (P1)(V2)  since we can say that P2 is twice P1. So we can divide each side by 2(P1) to get V2, or

1/2(100ml)=V2 or 50ml = V2.  When the pressure is doubled, the volume is cut in half. 

Now you work out B and C; the pressure is tripled, so the volume is 1/3 for B, and since the pressure is DOWN by a factor of 4 in c, the volume increases by a factor of 4 (4 times the initial pressure.)

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