A "shielding gas" mixture of argon and carbon dioxide is sometimes used in welding to improve the strength of the weld. If a gas cylinder of this two-part mixture was at 4.0 atm pressure and this mixture was 90.% argon, what would be the pressure due to the carbon dioxide gas component?
- anonymousLv 71 month ago
Dalton's law states that in a mixture of non-reacting gases, the total pressure exerted is equal to the sum of the partial pressures of the individual gases.
Total pressure = 4.0 atm
90.% of that pressure was due to argon:
(0.90 x 4.0 atm) = 3.6 atm.
Pressure due to carbon dioxide
= (4.0 - 3.6) atm
= 0.40 atm ……. to 2 sig figs