Sodium hydrogencarbonate decompose on heating according to the following equation:
2NaHCO3(s) --> NaCO2(s) + H2O(l) + CO2(g)
Calculate the volume of carbon dioxide that would be formed at room temperature and pressure when 2.5g of sodium hydrogencarbonate is heated.(H=1,C=12,O=16,Na=23)
please list out the steps,thx!
molar volume
2013-12-13 2:24 am
回答 (1)
2013-12-13 2:35 am
✔ 最佳答案
Molar mass of NaHCO₃ = 23+1+12+16×3 = 84No. of mole of 2.5g of sodium hydrogencarbonate = 2.5÷84=0.02976
No. of mole of CO₂ formed = 0.0296÷2 = 0.01488
Volume of CO₂(g) = 0.01488×24 = 0.3571 dm³ = 0.36 dm³
24 in the above calculation step is the molar volume of a gas under r.t.p. (room temperature and pressure) condition.
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