III Arvutused gaaside ja aurudega
3. Gaasisegu sisaldab: H2 25%, He 25%, N2 25%, CO2 25%. Milline on gaasisegu koostis
mahuprotsentides?
Lahendus:
Olgu segu kaalub 100g
Siis m(H2) = 25g, m(He) = 25g, m(N2) = 25g, m(CO2) = 25g
n(H2) = n/M = 25g/2g/mol = 12,5mol
n(He) = n/M = 25g/4g/mol = 6,25mol
n(N2) = n/M = 25g/28g/mol = 0,89mol
n(CO2) = n/M = 25g/44g/mol = 0,57mol
Gaaside ruumalad:
V(H2) = n*Vm = 12,5mol*22,4L/mol = 280L
V(He) = n*Vm = 6,25mol*22,4L/mol = 140L
V(N2) = n*Vm = 0,89mol*22,4L/mol = 19,9L
V(CO2) = n*Vm = 0,57mol*22,4L/mol = 12,7L
Gaaside üldruumala: 280L+140L+19,9L+12,7L = 452,6L
%(H2)V = (280L/452,6L)*100%=61,9%
%(He)V = (140L/452,6L)*100%=30,9%
%(N2)V = (19,9L/452,6L)*100%=4,4%
%(CO2)V = (12,7L/452,6L)*100%=2,8%
2
4. Õhk sisaldab mahuliselt 21% hapnikku, 78% lämmastikku ja 1% argooni. Arvutada õhu
koostis massiprotsentides.
annaabi.ee 
