10 Questions
What stoichiometric ratio did Alex establish between lithium hydroxide and CO2?
1:2
How did Alex convert the estimated moles of CO2 into the required moles of LiOH?
By using the stoichiometric ratio
What was the total moles of LiOH required for the entire 7-day journey per person?
Total moles for 7 days
How did Alex determine the realistic amount of lithium hydroxide needed per person?
By converting total moles to grams
What principles did Alex consider to align the estimated CO2 production with respiratory rates?
Human respiration and stoichiometric principles
What practical chemical reaction did Alex consider for planning the oxygen supply?
LiOH(s) + CO2(g) -> Li2CO3(s) + H2O(g)
How much carbon dioxide did Alex estimate each hiker would produce per breath during the hike?
0.02 moles
What percentage of carbon dioxide does an average person exhale with each breath?
0.04%
Why did Alex make a conservative assumption about the amount of CO2 attributed to each breath during the hike?
To account for variations in individual metabolic rates and the potential influence of environmental factors.
What factors did Alex recognize as crucial for the accuracy of their calculations?
Realistic estimations of human respiration and physical demands of the trek.
Study Notes
- High school student Alex in Scienceville was planning oxygen supply for a 7-day mountain hike.
- Began by considering chemical reaction of carbon dioxide absorption by lithium hydroxide.
- Understood importance of understanding human respiration rates for realistic CO2 calculation.
- Estimated an average person exhales around 0.02 moles of CO2 per breath during hike.
- Used stoichiometric ratio of 5 moles LiOH to 10 moles CO2 to convert CO2 moles to LiOH moles.
- Determined 1.05 kg of LiOH was required per person for entire 7-day journey.
- Calculation anchored in human biology for reasonable assumptions about respiration and oxygen needs.
Join Alex, a high school student passionate about chemistry, in planning the oxygen supply for a 7-day mountain hiking trip using the absorption of carbon dioxide by lithium hydroxide reaction as the basis. Explore the chemical reaction equation and its implications in this challenging journey.
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