If 1 mol/s stream of a mixture of 75 mol% n-hexane and 25 mol% n-heptane at 25C

 If 1 mol/s stream of a mixture of 75 mol% n-hexane and 25 mol% n-heptane at 25ºC is heated with 17,100 J/s at 1 atm, find the temperature, flowrate and composition of the vapor and liquid products. (The numbers may be similar to Problem 3, but you need to show a different strategy of solution. You MIGHT find it useful to calculate the bubble point temperature and the dew point temperature; those may help provide a good initial guess for the product temperature.)

((The problem 3 being referred to is as follows "A liquid mixture of n-hexane and n-heptane is to be flashed. How much energy per second is required to heat 1 mol/s of a mixture of 75 mol% n-hexane and 25 mol% n-heptane from 25ºC to 75ºC at 1 atm pressure (with vapor and liquid product streams leaving at 75ºC at equilibrium)? Also find the vapor and liquid product flowrates and compositions." I am only asking for the initial problem to be solved, not 3 as well.))