Calculate the amount of heat needed to melt 154. g of solid acetic acid (hch3co2) and bring it to a temperature of 39.5 . be sure your answer has a unit symbol and the correct number of significant digits.

Explanation:

Given temperatures are  as follows.

     Heat capacity for acetic acid =

     Melting point of acetic acid =

     Enthalpy of fusion for acetic acid = 11.73 kJ/mol

Number of moles of acetic acid =

                                                    = 2.564 mol

Now, conversion of solid acetic acid at to liquid acetic acid at

We know that,

            =

            = 30.075 kJ

Also, conversion of liquid acetic acid at to gas at

             =

             = 7252.1064 J

             = 7.252 kJ            (as 1 kJ = 1000 J)

Total heat energy required =

                       = 30.075 + 7.252

                     = 37.327 kJ

Thus, we can conclude that the amount of heat required is 37.327 kJ.

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l