Chemistry, 17.01.2020 19:31 pito63

The partial pressure of co2 gas in an unopened carbonated soft drink is 4.0 atm at 25°c. henry's law constant for co, in the soft drink is 3.1 x 102 mol/l atm at 25°c. the mole fraction of co2 in air at sea level is 3.3 x 104. a. what is the solubility of co2 gas-in-an-unopened soft drink bottle? nopened soft drink bottle? 3.1 x100/l x 4: 0 3 = 0.12 mol/l b. how many moles of co, gas are dissolved in an unopened 2 liter soft drink bottle? c. what is the solubility of co, gas in the opened soft drink at sea level? d. how many moles of co, gas are dissolved in 2 liters of soft drink left open at sea level?

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Answer from: vanessasmith47

Explanation:

Henry's law states that the amount of gas dissolved or molar solubility of gas is directly proportional to the partial pressure of the liquid.

To calculate the molar solubility, we use the equation given by Henry's law, which is:

$C_{g}=K_H\times p_{g}$

where,

K_H = Henry's constant

$p_{g}$ = partial pressure of gas

Henry constant = $K_H= 3.1\times 10^{-2}mol/L.atm$

Pressure of the carbon dioxide gas in an unopened bottle:

= $p_{CO_2}=4.0 atm$

Putting values in above equation, we get:

$C_{CO_2}=3.1\times 10^{-2}mol/L.atm\times 4.0 atm\\\\C_{CO_2}=0.124 mol/L$

0.124 mol/L is the solubility of CO_2 gas-in-an-unopened soft drink bottle.

Molarity of CO_2 gas = 0.124 mol/L

Moles of CO_2 gas in 2 Liter of soft drink:

= 0.124 mol/L × 2 L = 0.248 mol

0.248 moles of CO_2 gas are dissolved in an unopened 2 liter soft drink bottle.

Pressure at sea level = P = 1 atm

Mole fraction carbon dioxide gas at sea level:

= $\chi_{CO_2}=3.3\times 10^{-4}$

So, partial pressure of the CO_2 gas :

$p_{CO_2}=P\times \chi_{CO_2}=1atm\times 3.3\times 10^{-4}$

$p_{CO_2}=3.3\times 10^{-4} atm$

Henry constant = $K_H= 3.1\times 10^{-2}mol/L.atm$

The solubility of CO_2 gas in the opened soft drink at sea level:

$C_{CO_2} =3.1\times 10^{-2}mol/L.atm\times 3.3\times 10^{-4} atm$

$=1.023\times 10^{-5} mol/L$

$1.023\times 10^{-5} mol/L$ is the solubility of CO_2 gas in opened soft drink bottle at sea level.

Molarity of CO_2 gas in opened soft drink bottle at sea level = $1.023\times 10^{-5} mol/L$

Moles of CO_2 gas in 2 Liter of soft drink left open at sea level?:

= $1.023\times 10^{-5} mol/L\times 2L=2.046\times 10^{-5} mol$

$2.046\times 10^{-5}$ moles of [tex]CO_2[tex] gas are dissolved in 2 liter soft drink left open at sea level?

Answer from: Quest

the law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. because atoms are only rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both the reactants and products

Answer from: Quest

remember that hf is only the energy of one photon. not two. not three. one. 1) 5.12 * 10^3 photons find the energy of one photon, then determine how many photons are needed to reach the sensitivity. e = hf = (6.626 * 10^-34 js)(5.95 * 10^19 hz) = 3.94247 * 10^-14 j per photon (2.02 * 10^-10 j) / (3.94247 * 10^-14 j/photon) = 5123.69149 photons round to three sig figs. 2) 5.77 * 10^-17 j energy of pulse = energy per photon * number of photons = hfn = (6.626 * 10^-34 js)(1.66 * 10^13 hz)(5250) = 5.774559 * 10^-17 j round to three sig figs. 3) 4.07 * 10^8 kj/mol 10^12 pm = 1 m c = fλ f = c/λ e = hf = hc/λ = [(6.626 * 10^-34 js)(3.00 * 10^8 m/s) / (2.94 * 10^-12 m)](1 kj/1000 j)(6.02 * 10^23 photons/mol) = 40702571.4 kj/mol round to three sig figs. 4) 9.94 * 10^-1 m e = hc/λ λ = hc / e = (6.626 * 10^-34 js)(3.00 * 10^8 m/s) / (2.00 * 10^-25 j) = 0.9939 m round to three sig figs. 5) 9.06 * 10^3 photons energy of pulse = energy per photon * number of photons number of photons = energy of pulse / energy per photon = energy of pulse / (hf) = (3.87 * 10^-13 j) / [(6.626 * 10^-34 js)(6.45 * 10^16 hz)] = 9055.23695 photons round to three sig figs. 6) 2.78 * 10^-15 j this is problem 1, except in reverse. sensitivity = minumum number of photons * energy per photon = (5930)(6.626 * 10^-34 js)(7.077 * 10^14 hz) = 2.78070758 × 10^-15 j round to three sig figs.

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The partial pressure of co2 gas in an unopened carbonated soft drink is 4.0 atm at 25°c. henry's law...