100 K 1 atom/cm3 density hydrogen atom gas pressure mmHg

100 K 1 atom/cm3 density hydrogen atom gas pressure mmHg

 

 

The matter in interstellar space consists

almost entirely of hydrogen atoms at a temperature of 100 K

and a density of approximately 1 atom/cm^3.

What is the gas pressure in millimeters of mercury?

 

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(1 atom/mL) (1 mol / 6.022×10^23 atom) (1000 mL / 1 L)

= (1) (1 / (6.022×10^23)) (1000)

= 1.6606×10^(-21) mol/L

 

 

 

PV = nRT

( 참고 https://ywpop.tistory.com/3097 )

 

P = nRT / V

= (1.6606×10^(-21)) (0.08206) (100) / (1)

= 1.3627×10^(-20) atm

 

 

 

(1.3627×10^(-20) atm) (760 mmHg / 1 atm)

= 1.04×10^(-17) mmHg

 

 

 

답: 1.04×10^(-17) mmHg

---> This is a very hard vacuum.

 

 

 

 

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