Question

In: Chemistry

Which of the following statements is true? a. If bond enthalpies of bonds broken in a...

Which of the following statements is true?

a. If bond enthalpies of bonds broken in a reaction are greater than bond enthalpies of bonds formed, the reaction is exothermic.

b. If the number of bonds broken in a reaction is greater than the number of bonds formed, the reaction is endothermic.

c. If the sum of all bond enthalpies of bonds broken in a reaction is greater than the sum of all bond enthalpies of bonds formed, the reaction is endothermic.

d.

If the sum of all bond enthalpies of bonds broken in a reaction is greater than the sum of all bond enthalpies of bonds formed, the reaction is exothermic.

e. If the number of bonds broken in a reaction is greater than the number of bonds formed, the reaction is exothermic.

Solutions

Expert Solution

Enthalpy change = bond enthalpies of bonds broken - bond enthalpies of bonds formed

a. If bond enthalpies of bonds broken in a reaction are greater than bond enthalpies of bonds formed, the reaction is endothermic.

Sothe given statement is false

b. If the number of bonds broken in a reaction is greater than the number of bonds formed, the reaction is endothermic. (TRUE)

c. If the sum of all bond enthalpies of bonds broken in a reaction is greater than the sum of all bond enthalpies of bonds formed, the reaction is endothermic. (TRUE)

d.If the sum of all bond enthalpies of bonds broken in a reaction is greater than the sum of all bond enthalpies of bonds formed, the reaction is endothermic.So the given statement is false.

e. If the number of bonds broken in a reaction is greater than the number of bonds formed, the reaction is endothermic.Sothe given statement is false

queen_honey_blossom answered 2 years ago
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