The following table provides some information on carbon dioxide solubility in wa

ID: 995996 • Letter: T

Question

The following table provides some information on carbon dioxide solubility in water.

1,What pressure is required to achieve a CO2 concentration of 8.60×102 M at 20C?

Express your answer to three significant figures and include the appropriate units.

2,At 1 atm, how many moles of CO2 are released by raising the temperature of 1 liter of water from 20C to 25C?

Express your answer to four decimal places and include the appropriate units.

C
(mol/L) P
(atm) k
(mol/Latm) T
(C) 3.80×102 1.00 20.0 8.60×102 20.0 1.00 3.40×102 25.0

according to henry law

C = P x k

now

at 20 C

3.8 x 10-2 = 1 x k

k = 3.8 x 10-2

now

C = 8.6 x 10-2

8.6 x 10-2 = P x 3.8 x 10-2

P = 2.263

pressure required is 2.263 atm

at 25 C

C = P x k

C = 1 x 3.4 x 10-2

C = 3.4 x 10-2 mo1/L

given

1 L of water

At 20 C and 1 atm

moles of C02 = concentration x volume

moles of C02 = 3.8 x 10-2 x 1

moles of C02 = 3.8 x 10-2

now

at 25 C and 1 atm

moles of C02 = 3.4 x 10-2 x 1

moles of C02 = 3.4 x 10-2

now

moles of C02 released = moles at 20 C - moles at 25 C

moles of C02 released = ( 3.8 x 10-2) - ( 3.4 x 10-2)

moles of C02 released = 4 x 10-3

moles of C02 released = 0.004

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