Saturday

January 24, 2015

January 24, 2015

Posted by **Jenny** on Friday, September 7, 2012 at 3:25am.

Determine the energy required to turn a Na metal atom into a gas phase ion (Na+ (g)).

Ionization energy of Na(g) 499 kJ/mol

Electron affinity of O(g)for2e- 603 kJ/mol

Energy to vaporize Na(s) 109 kJ/mol

O2(g) bond energy 499 kJ/mol

Energy change for the reaction:

2Na(s) + 1/2 O2(g)---> Na2O(s) -416kJ/mol

I think I will use Na(s)-->Na(g) and

Na(g)-->Na+(g)

to solve this problem and this is my answer:

499+(109x2)= 717 kJ/mol

This is my answer.

Please help me out to check my answer and if I did wrong, please help me to show what steps I should do to get the right answer.

Thank you so much.

- chemistry -
**DrBob222**, Friday, September 7, 2012 at 11:57amI would agree with 499 kJ/mol + 109 kJ/mol = ? but I don't know why you multiplied by 2.

**Answer this Question**

**Related Questions**

Chem 1 - It takes 208.4 kJ of energy to remove 1 mole of electrons from an atom ...

solving Equations - Solve x square pluse 5x subtracting by 6 equals zero? X^2 + ...

Chemistry - 1.) The average velocity of Cl(2) molecules is 2.50 x 10^3 m/sec at ...

8th Grade Algebra- Answer Check - Solve each system of equations, give the ...

College Chemistry - I have no idea how to do this problem, and I've been ...

Chem (Specific Heat) - I am confused as to how to solve this problem. Can ...

Gas Laws and Energy - I have another question. I've tried it and i keep getting ...

Algebra 2 (check) - I have some problems that I've answered and I need someone ...

Math - Hi, would someone mind just checking the answer I got for this formula ...

Chemistry - 1) Determine the equilibrium constant, Keq, at 25°C for the reaction...