Wednesday

April 1, 2015

April 1, 2015

Posted by **Chopsticks** on Wednesday, March 25, 2009 at 12:48am.

(P1V1/T1) = (P2V2/T2)

Is that the same thing as

P1V1T2=P2V2T1 ??

- DrBob22 -
**Chopsticks**, Wednesday, March 25, 2009 at 1:48amSuppose that 120.mL of argon is collected over water at 25C and 780.0 torr. Compute the volume of the dry argon at STP.

Would this be involved with Charles law?

DrBob11:

(P1V1/T1) = (P2V2/T2)

Don't forget to use T in Kelvin. Subtract the vapor pressure of water from the total pressure for this problem as well as the previous one.

Why do I have to subtract the vapor pressure of water? Shouldn't I be ignoring water vapor because the answer is talking about dry Ar though??

- DrBob22 -
**DrBob222**, Wednesday, March 25, 2009 at 12:22pmSure.

(P1V1/T1) = (P2V2/T2) =

P1V1T2 = P2V2T2.

That's the general gas law. It becomes Boyle's Law if you keep T constant (just cover up T1 and T2 and you're left with P1V1=P2V2).

Or it becomes Charle's Law if P is constant (cover up P1 and P2 and it becomes V1T2=V2T1).

And if V is held constant, (cover V1 and V2) and you have P1T2 = P2T1.

**Answer this Question**

**Related Questions**

Chem help! - I need help for this question in combining gas law P1V1/T1=P2V2/T2...

chemistry - At 9.20 cm cubed air bubble forms in a deep late at a depth where ...

Need help also with this chem ? - I also thought this question on combining gas ...

Chemistry - The volume of a mass of gas is 300 ml at 25°C and 685 torr. What ...

Physics - If 2.4 m^3 of a gas initially at STP is compressed to 1.6 m^3 and its ...

Chemistry II - If the volume of a cylinder is 1.01 L at STP (0 C and 760 Torr). ...

Check my answered questions. - For the combining gas law P1V1/T1=P2V2/T2 home ...

chemistry - DrBob222- Is STP = to 273K? If so, would i use P1V1/T1 = P2V2/T2??

Drbob22 - Trust me Drbob22 if I would have known the answer I wouldn't have ...

Chemistry - At a pressure of 2.4 atm a balloon has a volume of 9.8 L. If the ...