January 29, 2023, 03:11:01 PM
Forum Rules: Read This Before Posting

### Topic: Stoichiometry, Ideal Gas Law  (Read 6394 times)

0 Members and 1 Guest are viewing this topic.

#### zeus

• Guest
##### Stoichiometry, Ideal Gas Law
« on: April 21, 2004, 09:16:56 PM »

A resting astronaut exhales about 409 quarts of carbon dioxide, measured at 86F and 14.7 psi every 24 hours. The concentration of carbon dioxide in a spaceship can be kept to a minimum by cycling the air through solid lithium hydroxide. Lithium hydroxide reacts with carbon dioxide to produce lithium carbonate and water.

(A)What is the balanced equation for the reaction,  showing the states of the reactants and products...

UPDATE 4/22/04 @ 10:24am Eastern Time...Well I found out the answer to this question; can someone let me know if I am correct.

2LiOH + CO2 ---> Li2CO3  + H20
reactants              products

(B)What minimum weight of lithium hydroxide required to remove all the carbon dioxide exhaled by an astronaut during a 10 day voyage to the moon?

UPDATE:
UPDATE as of 4/23/2004, some progress but still do not know if the following is correct to (B)

Li2(OH)
6.94 x 2 = 13.88/ml
Density 13.88/1ml = 0.0138/ml x 10
=0.138 Li2(OH) in 10 days.

Is their anyone who can verify this for me.

« Last Edit: April 24, 2004, 06:22:40 PM by hmx9123 »

#### gregpawin

• Chemist
• Full Member
• Posts: 245
• Mole Snacks: +22/-5
• Gender:
• Ebichu chu chu chuses you!
##### Re:chem problem
« Reply #1 on: April 22, 2004, 01:12:20 AM »
oooh this sounds like a fun one

409 quart [US, liquid] = 0.3870584 cubic meter
86 degree Fahrenheit = 30 degree Celsius
14.7 pound-force/square inch (PSI) = 1.0002756 atmosphere [standard]

from: http://www.onlineconversion.com/
« Last Edit: April 22, 2004, 01:17:48 AM by gregpawin »
I've got nothin'

#### Mitch

• General Chemist
• Sr. Member
• Posts: 5298
• Mole Snacks: +376/-3
• Gender:
• "I bring you peace." -Mr. Burns
##### Re:chem problem
« Reply #2 on: April 22, 2004, 02:17:43 AM »
add it to the links section, create a new category if you have too.
Most Common Suggestions I Make on the Forums.
1. Start by writing a balanced chemical equation.
2. Don't confuse thermodynamic stability with chemical reactivity.
3. Forum Supports LaTex