<span>[Ne] 3s2 3p5
Hope this helps!</span>
Answer:
Exothermic
q = -8.03 kJ/g
Explanation:
<em>When 2 moles of Na(s) react with H₂O(l) to form NaOH(aq) and H₂(g) according to the following equation, 369 kJ of energy are evolved.</em>
The thermochemical equation is:
2 Na(s) + 2 H₂O(l) → 2 NaOH(aq) + H₂(g) ΔH = -369 kJ
Since the energy is evolved, the reaction is exothermic, which is why the enthalpy of the reaction (ΔH) is negative.
The heat released (q) per gram of Na(s) is (molar mass 22.98 g/mol):
![\frac{-369kJ}{2molNa} .\frac{1molNa}{22.98gNa} =-8.03kJ/g](https://tex.z-dn.net/?f=%5Cfrac%7B-369kJ%7D%7B2molNa%7D%20.%5Cfrac%7B1molNa%7D%7B22.98gNa%7D%20%3D-8.03kJ%2Fg)
Balance<span> the number of atoms of the key element on both sides. Add the appropriate number of electrons to compensate for the change of oxidation state. Add H</span>+(in acid medium), or OH-<span> (in basic medium), to </span>balance the charge<span> on both sides of the </span>half-reactions; and H2<span>O, if necessary, to </span>balance<span> the equations.</span>
The question doesn’t make sense sorry