헬륨의 제곱 평균근 속도. rms of He at 1 atm and 8.20 K

헬륨의 제곱 평균근 속도. rms of He at 1 atm and 8.20 K

 

 

What is the root mean square velocity of helium at 1 atm and 8.20 K?

 

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He의 몰질량 = 4.003 g/mol = 0.004003 kg/mol

R = 8.314 J/mol•K = 8.314 kg•m^2/s^2•mol•K

( 1 J = 1 kg•m^2/s^2 )

 

 

u_rms = root(3RT / M)

( 식 설명 https://ywpop.tistory.com/45 )

 

u_rms = (3 × 8.314 × 8.20 / 0.004003)^(1/2) = 226.037

 

 

답: 226 m/s

 

 

The root mean square velocity of helium at 8.20 K is 226 m/s.