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Heat of formation for CO is -110.5 KJ/mol and the heat of formation for MgO is -

ID: 692705 • Letter: H

Question

Heat of formation for CO is -110.5 KJ/mol and the heat of formation for MgO is -602 KJ/mol. Which of the following statements is true?

Impossible to determine to given data.

The bonds in MgO and CO are equally strong.

The bond in MgO is stronger than the bond in CO.

The bond in CO is stronger than the bond in MgO.

a.

Impossible to determine to given data.

b.

The bonds in MgO and CO are equally strong.

c.

The bond in MgO is stronger than the bond in CO.

d.

The bond in CO is stronger than the bond in MgO.

Explanation / Answer

MgO releases more heat for formation of 1 moil of bond as compared to CO

So, the bond in MgO will be stronger than that of CO

Answer: c

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