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Can someone help me write the equations for henrys law and raoults law (not necessarily solve them) for this question please??

Can someone help me write the equations for henrys law and raoults law (not necessarily solve them) for this question please??


A 1 m3 volume of water at 25°C initially contains 40 mg L-1 dissolved O2 and 1200 mg L-1 dissolved CO2 in a closed vessel with a large gas space of 10 m3 above the water. The solution can be considered to be ideally dilute. The gas space initially contains air at ambient conditions (i.e., 25°C, 1 atm total pressure, PO2 = 0.21 atm). The air initially contains no CO2.

The following information is known about the system:

·       Henry's Law constant (on a mole fraction basis) for O2 in water = 4.35 x 104 atm at 25°C.

·       Henry's Law constant (on a mole fraction basis) for CO2 in water = 1638.5 atm at 25°C.

·       Enthalpy of solution of CO2 in water = -18,800 J mol-1.

·       Enthalpy of solution of O2 in water =  -15,400 J mol-1

·       Density of water = 1 kg L-1.

Neglect the vapour pressure of water, determine the concentrations (in units of mg L-1) of dissolved O2 and CO2 remaining in solution when equilibrium between the two phases is reached at 25°C.

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