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25℃ 2.00 L O2(g) 785 torr 1.94 L vapor press water

by 영원파란 2022. 4. 23.

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25℃ 2.00 L O2(g) 785 torr 1.94 L vapor press water

 

 

A 2.00 L sample of O2(g) was collected over water

at a total pressure of 785 torr and 25℃.

When the O2(g) was dried (water vapor removed),

the gas had a volume of 1.94 L at 25℃ and 785 torr.

Calculate the vapor pressure of water at 25℃.

 

---------------------------------------------------

 

P1V1 = P2V2

( 참고 https://ywpop.tistory.com/1977 )

 

 

 

P1 = P2V2 / V1

= (785) (1.94) / (2.00)

= 761.45 torr

---> O2의 분압

 

 

 

H2O의 분압 = 785 – 761.45 = 23.55 torr

 

 

 

답: 23.6 torr

( 참고: 물의 증기압 도표 https://ywpop.tistory.com/5014 )

 

 

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