Help me answer this three problem or two problem here i really need to pass This exam ??? im begging you please help me i dont have ask expert question so please solve two problems for me as a gift this coming Christmas. thank you so muchhh Transcribed Image Text: 4. At 20°C, n-pentane has a vapor pressure of 0.573 bar (P1*) and n-hexane has a vapor pressure of 0.157 bar (P2*).
A solution has a mole fraction of n-pentane of 0.550(x) at 20°C. [This makes 0.450 the mole fraction (x2) of
n-hexane]. If the partial pressure of the n-pentane above this solution is 0.295 bar and the partial pressure of
n-hexane is 0.0606 bar, what are the activity coefficients (yi) of n-pentane and n-hexane for the solution?
5. Calculate the vapor pressure of an aqueous solution where the mole fraction of a nonvolatile solute is 0.0300 and
the temperature is 35°C. The vapor pressure of pure water at 35°C is 42.2 torr.
6. Determine the mole fraction of benzene (XB) in a benzene-toluene mixture that boils at 363 K and 1.00 atm (Psoln).
At 363 K, the vapor pressure of pure benzene (P°B) is 1.34 atm and the vapor pressure of pure toluene (P°T) is 0.534
atm.
