Question

Soft drinks are canned under 4 atm of CO₂ and release CO₂ when opened.(b) After it has gone flat?

Answer 1

Moles of  CO₂ after it has gone flat is 4.69×10⁶ mol

Given,

  Pressure of Carbon Dioxide= 4atm

  Volume of Can of soda=355ml

  Henry's Constant of CO₂ = 3.3 ×10² mol/L.atm

Now,

   We know that

C =  $k_{H}$×P

where

C= concentration of CO₂

C= 3.3 ×10² mol/L.atm×4atm

Hence ,

 Concentration of CO₂= 0.132 mol/L

Given

  Volume of soda = 355ml=0.355L

Hence,

  No. of moles of Carbon Dioxide =  0.132 mol/L×0.355L

                                                        = 0.047 mol

b) When we open the can, Carbon Dioxide will realease the pressure in the can will equal to the pressure of Carbon Dioxide in air.

According to Henry's Law

 We know that ,

   C =  $k_{H}$×P

partial pressure of CO₂ = 4×10⁻⁴ atm

Hence ,

 C = 3.3 ×10² mol/L.atm×4×10⁻⁴ atm

     = 1.32 ×10⁻⁵mol/L

Hence in 355 ml of can moles of CO₂ =   1.32 ×10⁻⁵mol/L × 0.355L

                                                               = 4.69×10⁶ mol of  CO₂ after the soda has gone flat.

 From the above conclusion we can say that , Moles of  CO₂ after it has gone flat is 4.69×10⁶ mol.

Learn more about  Henry's Law here: brainly.com/question/23204201

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