Question 1 the heat of vaporization δhv of dichloromethane ch2cl2 is 28.0 /kjmol . calculate the change in entropy δs when 210.g of dichloromethane condenses at 39.8°c . be sure your answer contains a unit symbol and the correct number of significant digits.

Answer:             1.0  × 10⁻⁵ msolution:                     as we know ph is given as,                                    ph  = -log [h⁺]and,                                    [h⁺]  =  10^-ph    (1)putting value of ph in eq. 1,                                    [h⁺]  =  10⁻⁵                                    [h⁺]  =  1.0  × 10⁻⁵ m

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