"clapeyorni" - 1 õppematerjal

Süsinikdioksiidi molaarmassi määramine.

𝑉𝑚 (𝑑𝑚3 /𝑚𝑜𝑙) 22,4 𝑚 (𝑔) 𝑚 (𝑔) 0,568 𝑔 𝑛= ⇒𝑀 = = = 43,692 𝑔/𝑚𝑜𝑙 𝑀 (𝑔/𝑚𝑜𝑙) 𝑛 (𝑚𝑜𝑙) 0,013 𝑚𝑜𝑙 |𝑀𝐶𝑂2 − 44,0| ∗ 100% |43,692 − 44,0| ∆% = = ∗ 100 = 0,7% 44,0 44,0 b) Kasutades Clapeyorni valemit 𝑚 𝑃𝑉 = 𝑅 𝑇⇒ 𝑀 𝑚 0,000568 𝑀= 𝑅 𝑇= ∗ 8,314 ∗ 273,15 = 43,502 (𝑚𝑜𝑙) 𝑃𝑉 101,2 ∗ 0,0002931 |𝑀𝐶𝑂2 − 44,0| ∗ 100% |43,502 − 44,0| ∆% = = ∗ 100 = 11,3% 44,0 44,0