How many grams of CO 2 are dissolved in a 1.00 L bottle of carbonated water at 298 K if the pressure used in the carbonation process was 2.4 bar? What volume would the dissolved CO 2 occupy as a gas at 298 K and 1.00 bar?



Answer :

Answer:

To solve this problem, we can use the ideal gas law to relate the pressure, volume, temperature, and number of moles of the gas. The ideal gas law is given by:

�

�

=

�

�

�

PV=nRT

Where:

�

P is the pressure of the gas (in bar)

�

V is the volume of the gas (in liters)

�

n is the number of moles of the gas

�

R is the ideal gas constant (

0.0831

 

L

â‹…

bar

â‹…

K

−

1

â‹…

mol

−

1

0.0831Lâ‹…barâ‹…K

−1

â‹…mol

−1

)

�

T is the temperature of the gas (in Kelvin)

First, let's calculate the number of moles of

�

�

2

CO

2

​

 dissolved in the carbonated water using the given pressure and volume:

�

=

�

�

�

�

n=

RT

PV

​

�

=

2.4

 

bar

â‹…

1.00

 

L

0.0831

 

L

â‹…

bar

â‹…

K

−

1

â‹…

mol

−

1

â‹…

298

 

K

n=

0.0831Lâ‹…barâ‹…K

−1

â‹…mol

−1

â‹…298K

2.4barâ‹…1.00L

​

�

=

0.0996

 

moles

n=0.0996moles

Now, we can convert the moles of

�

�

2

CO

2

​

 to grams using the molar mass of

�

�

2

CO

2

​

, which is approximately

44.01

 

g/mol

44.01g/mol:

�

=

�

×

molar mass

m=n×molar mass

�

=

0.0996

 

moles

×

44.01

 

g/mol

m=0.0996moles×44.01g/mol

�

=

4.37

 

grams

m=4.37grams

So, there are approximately 4.37 grams of

�

�

2

CO

2

​

 dissolved in the 1.00 L bottle of carbonated water.

Next, to find the volume the dissolved

�

�

2

CO

2

​

 would occupy as a gas at 298 K and 1.00 bar, we can use the ideal gas law again. We'll use the number of moles we calculated earlier and the new pressure and temperature:

�

=

�

�

�

�

V=

P

nRT

​

�

=

0.0996

 

moles

×

0.0831

 

L

â‹…

bar

â‹…

K

−

1

â‹…

mol

−

1

â‹…

298

 

K

1.00

 

bar

V=

1.00bar

0.0996moles×0.0831L⋅bar⋅K

−1

â‹…mol

−1

â‹…298K

​

�

≈

2.46

 

L

V≈2.46L

So, the dissolved

�

�

2

CO

2

​

 would occupy approximately 2.46 liters as a gas at 298 K and 1.00 bar.

Explanation:

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