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Novosadov [1.4K]

3 years ago

5

For each of the following ionic bonding examples, show the transfer of electrons, the ions resulting with the charges and the fi

nal chemical formula of the compund.
Ba and O,
Al and O,
Mg and P,
Na and O,
Ca and Cl

1 answer:

fgiga [73]3 years ago

6 0

Answer:

BaO

Ba gives up two electrons and becomes Ba⁺²
O takes two electron and becomes O⁻²

Al₂O₃

Mg₃P₂

Na₂O

CaCl₂

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Explanation:

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We have :

Enthalpy changes of formation of following s:

$\Delta H_{f,Cu(NO_3)_2}=-302.9 kJ/mol$

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$\Delta H_{f,O_2}= 0 kJ/mol$ (standard state)

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The equation for the enthalpy change of the given reaction is:

$\Delta H_{rxn}$ =

$=(2 mol\times \Delta H_{f,CuO}+4\times \Delta H_{f,NO_2}+1 mol\times \Delta H_{f,O_2})-(2mol\times \Delta H_{f,Cu(NO_3)_2})$

$\Delta H_{rxn}$ =

$(2mol\times (-157.3 kJ/mol)+4\times 33.2 kJ/mol=1 mol\times 0 kJ/mol)-(2 mol\times (-302.9 kJ/mol)$

$\Delta H_{rxn}=424 kJ$

The enthalpy change for the given reaction is 424 kJ.

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