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For the volume of carbon dioxide produced from 2100 kg of sodium hydrogen carbonate. The reaction is given as:

Chemistry

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280000 dm3 or 280 m3\text{280000 dm}^3 \text{ or } 280 \text{ m}^3

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The problem asks for the volume of carbon dioxide produced from 2100 kg of sodium hydrogen carbonate. The reaction is given as:

2NaHCO3(s)→heatNa2CO3(s)+CO2(g)+H2O(g)2\text{NaHCO}_3(\text{s}) \xrightarrow{\text{heat}} \text{Na}_2\text{CO}_3(\text{s}) + \text{CO}_2(\text{g}) + \text{H}_2\text{O}(\text{g})

We are given the relative atomic masses: Na=23\text{Na}=23, H=1\text{H}=1, C=12\text{C}=12, O=16\text{O}=16.
We need to find the volume of CO2\text{CO}_2 at STP (Standard Temperature and Pressure). At STP, 1 mole of any gas occupies 22.4 dm3\text{dm}^3.

  1. Calculate the molar mass of NaHCO3\text{NaHCO}_3.

    Molar mass of NaHCO3=(23×1)+(1×1)+(12×1)+(16×3)\text{Molar mass of } \text{NaHCO}_3 = (23 \times 1) + (1 \times 1) + (12 \times 1) + (16 \times 3) =23+1+12+48=84 g/mol= 23 + 1 + 12 + 48 = 84 \text{ g/mol}
  2. Convert the mass of NaHCO3\text{NaHCO}_3 from kg to g and then to moles.

    Given mass of NaHCO3=2100 kg=2100×1000 g=2.1×106 g\text{NaHCO}_3 = 2100 \text{ kg} = 2100 \times 1000 \text{ g} = 2.1 \times 10^6 \text{ g}

    Moles of NaHCO3=MassMolar mass=2.1×106 g84 g/mol\text{Moles of } \text{NaHCO}_3 = \frac{\text{Mass}}{\text{Molar mass}} = \frac{2.1 \times 10^6 \text{ g}}{84 \text{ g/mol}} =25000 mol= 25000 \text{ mol}
  3. Use the stoichiometry of the reaction to find the moles of CO2\text{CO}_2 produced.

    From the balanced equation, 2 moles of NaHCO3\text{NaHCO}_3 produce 1 mole of CO2\text{CO}_2.

    Moles of CO2=Moles of NaHCO3×1 mol CO22 mol NaHCO3\text{Moles of } \text{CO}_2 = \text{Moles of } \text{NaHCO}_3 \times \frac{1 \text{ mol } \text{CO}_2}{2 \text{ mol } \text{NaHCO}_3} =25000 mol×12=12500 mol= 25000 \text{ mol} \times \frac{1}{2} = 12500 \text{ mol}
  4. Calculate the volume of CO2\text{CO}_2 at STP.

    At STP, 1 mole of gas occupies 22.4 dm3\text{dm}^3.

    Volume of CO2=Moles of CO2×22.4 dm3/mol\text{Volume of } \text{CO}_2 = \text{Moles of } \text{CO}_2 \times 22.4 \text{ dm}^3/\text{mol} =12500 mol×22.4 dm3/mol= 12500 \text{ mol} \times 22.4 \text{ dm}^3/\text{mol} =280000 dm3= 280000 \text{ dm}^3
  5. Convert the volume to m3\text{m}^3 (optional, but often preferred for large volumes).

    Since 1 m3=1000 dm31 \text{ m}^3 = 1000 \text{ dm}^3:

    Volume of CO2=280000 dm31000 dm3/m3=280 m3\text{Volume of } \text{CO}_2 = \frac{280000 \text{ dm}^3}{1000 \text{ dm}^3/\text{m}^3} = 280 \text{ m}^3

    The volume of carbon dioxide produced is 280000 dm3 or 280 m3\text{280000 dm}^3 \text{ or } 280 \text{ m}^3.

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