a). DH° = 268.2 kJ for the reaction: FeBr 3 (s) ® Fe (s) + 3/2 Br 2 (l). For thi

Question

a). DH° = 268.2 kJ for the reaction: FeBr3 (s) ® Fe (s) + 3/2 Br2 (l). For this reaction,

    which have, on the average, stronger bonds, the reactants or the products?

b). 1.30 g of a solid were added to a coffee cup calorimeter containing 50.4 g of water at

     24.1°C. When the solid had dissolved in the water, the temperature of the solution

     (water) had increased to 30.4°C. Find DH for the formation of this solution in Joules

      per gram of solid dissolved. (The specific heat of water is 4.18 J °C per J/g°C.)

c). A reaction between HCl and NaOH was carried out in a coffee cup calorimeter

     containing 50.0 g of water at 23.5°C. DH° for the reaction is -1442 J. Calculate the

     temperature of the water when the reaction is over

Explanation / Answer

1)

DHo is positive

So reaction is endothermic

TO break a bond , energy is required

So we can say that energy required to break eeactants bonds are more

So reactants have stronger Bond

rest of the questions are not related to this and hence will be considered as different questions

I am allowed to answer only 1 question at a time

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