Midterm 2 - Question 1 | General Chemistry 1

Consider the formation of gaseous magnesium oxide from elemental gaseous magnesium and oxygen.


1) Write the chemical equation of this reaction.

2) Determine the overall change in energy for the formation of gaseous magnesium oxide.

3) Does this formation release or absorb energy? Explain.

4) Would it require more energy to melt CO (s) or MgO (s)? Explain.


Data:

I1 (Mg) = 1.23 aJ

I2 (Mg) = 2.41 aJ

EA1 (O) = -0.234 aJ

EA2 (O) = 1.30 aJ

k = 231 aJ.pm

rMg2+ = 72 pm

rO2- = 140 pm