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Homework Help: Gas: Liters of CO2 produced

  1. Mar 3, 2015 #1
    1. The problem statement, all variables and given/known data
    (problem won't be word for word, because much of the info. is to throw people off); This large gummy bear, which contains 51 servings and each serving contains 29 grams of carbs. Assuming all the carbs are glucose, how many liters of CO2 would eating this gummy bear cause one to exhale.

    2. Relevant equations
    Not a specific equation I'm thinking.

    3. The attempt at a solution
    So since there is 51 servings with each serving containing 29 grams of carbs, the total amount of carbs which is glucose in this case is 1479 grams. I started out with the equation for cellular respiration:
    C6H12O6 + 6 O2 → 6 H2O + 6CO2 + energy. I'm thinking I should take 1479 grams, divide it by the molar mass of glucose, and then convert it to moles of glucose, then moles of CO2. But instead of moles I should treat them as liters instead. Would this get me the right answer?
  2. jcsd
  3. Mar 4, 2015 #2


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    Science Advisor
    Homework Helper
    Gold Member

    Do you have any specific doubts about this strategy?
  4. Mar 4, 2015 #3
    Yeah I don't feel like I'm doing it right. Would doing all the stoichiometry I stated above to find the moles of CO2 and using PV=nRT work? If so, would the temperature be body temp and would the pressure be 1 atm?
  5. Mar 4, 2015 #4


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    Staff: Mentor

    Yes, yes, yes and yes.
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