Let substance A be a pure solid as a component in an ideal solution and xA represent the mole fraction of substance A in this ideal solution. You may also consider xA as the solubility of substance A, expressed as a mole fraction, in this solution.

(1) What is the temperature effect on x when the pressure is held constant?

(2) If naphthalene (C10H8) at 1 atm has its melting-point at 80.05C and enthalpy of melting at 18.58 kJ/mol, what is its ideal solubility at 20 deg * C ? (8%) Please detail your algorithm leading to your answers/conclusions, as well as tabel all variables used in your deduction clearly.

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Question 4. Let substance A be a pure solid as a component in an ideal solution and A represent the mole fraction of substance A in this ideal solution. You may also consider XA as the solubility of substance A, expressed as a mole fraction, in this solution. (1) What is the temperature effect on XA, when the pressure is held constant? (2) If naphthalene (C10H8) at 1atm has its melting-point at 80.05C and enthalpy of melting at 18.58kJ/mol, what is its ideal solubility at 20C ? Please detail your algorithm leading to your answers/conclusions, as well as label all variables used in your deduction clearly