Question

4. When the beer is bottled in one to three weeks, one teaspoon of dextrose is used for priming (adding carbonation in the bottle). What volume of CO2 at STP is produced after bottling? 1 teaspoon = 0.1667 fluid ounces, 1 fluid ounce = 29.57 mL and density of dextrose= 1.54 g/mL

Answer 1

Q4. Formula of Dextrose is C₆H₁₂O₆

volume of dextrose added = 1 teaspoon

volume of dextrose added = 1 teaspoon * (0.1667 fl. oz. / 1 teaspoon) * (29.57 mL / 1 fl. oz.)

volume of dextrose added = (1 * 0.1667 * 29.57) mL

volume of dextrose added = 4.93 mL

mass of dextrose added = (volume of dextrose added) * (density of dextrose)

mass of dextrose added = (4.93 mL) * (1.54 g/mL)

mass of dextrose added = 7.59 g

moles of dextrose added = (mass of dextrose added) / (molar mass of C₆H₁₂O₆)

moles of dextrose added = (7.59 g) / (180.1 g/mol)

moles of dextrose added = 0.0421 mol

moles CO₂ produced = 6 * (moles of dextrose added)

moles CO₂ produced = 6 * (0.0421 mol)

moles CO₂ produced = 0.253 mol

volume CO₂ produced at STP = (moles CO₂ produced) * (molar volume at STP)

volume CO₂ produced at STP = (0.253 mol) * (22.4 L/mol)

volume CO₂ produced at STP = 5.66 L