Qhov ceev ntawm helium kg m3 yog dab tsi?
Qhov ceev ntawm helium kg m3 yog dab tsi?

Video: Qhov ceev ntawm helium kg m3 yog dab tsi?

Video: Qhov ceev ntawm helium kg m3 yog dab tsi?
Video: pob txha ntses daig caj pas lawm yuav ua li cas 2024, Kaum ib hlis
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Kev sib tham

khoom ceev ( kg/m 3) khoom
helium, roj, ~ 300 K 0.164 dej, kua, 0 ° C
helium, kua, 4k 147 dej, dej khov, 0 ° C
hydrogen (H2), 300 K 0.082 dej, dej khov, -50 ° C
hydrogen (H2), dej, 17 K 71 dej, dej khov, -100 ° C

Raws li txoj cai, qhov ceev ntawm helium yog dab tsi?

Khoom helium muaj ib ceev 0.214 ± 0.006g / cm33 ntawm 1.15 K thiab 66 atm; qhov projected ceev ntawm 0 K thiab 25 bar (2.5 MPa) yog 0.187 ± 0.009 g / cm33. Thaum kub siab dua, helium yuav solidify nrog txaus siab.

Tsis tas li ntawd, qhov ceev ntawm hydrogen hauv kg m3 yog dab tsi? Nyob rau hauv siab Yog li, ntawm 700 bar, uas yog 700 lub sij hawm ib txwm atmospheric siab, hydrogen muaj ib ceev ntawm 42 kg / m3 , piv nrog 0.090 kg / m3 nyob rau hauv ib txwm siab thiab kub tej yam kev mob.

Ua raws li qhov xav tau, qhov ceev ntawm 1000 kg m3 yog dab tsi?

SI unit of ceev yog kg / m3 . Dej ntawm 4 ° C yog siv ρ = 1000 kg / m3 = 1 kg /dm3 = 1 kg /l los yog 1 g / cm3 = 1 g/ml. Ceeb Toom: Tsis txhob rov sau tus lej ntawm cov lus teb. Ntau tus neeg tseem siv g/cm3 (gram per cubic centimeter) los yog kg /L ( kilograms ib liter) ntsuas ceev.

Dab tsi yog qhov ceev ntawm helium hauv g mL?

hnyav 0.00018 g /cm³ (0.0001 oz/in³), melting thiab Helium hnyav 0.0001785 gram ib cubic centimeter los yog 0.1785 kilogram ib cubic meter, i.e. Qhov ntom ntawm helium yog sib npaug 0.1785 kg/m³; ntawm 0 ° C (32 ° F lossis 273.15K) ntawm tus qauv atmospheric siab.

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