I need help understanding the content on this whole page: D, E, F, and G. I have

Question

I need help understanding the content on this whole page: D, E, F, and G. I have attached the steps I used to solve on the first page.
I need help understanding the content on this whole page: D, E, F, and G. I have attached the steps I used to solve on the first page. d. Find All for the dissolution of 1.00 g NaOH in water. A disr 1003 e. Find ?// for the dissolution of 1 mole NaOH in water. f. Given that NaOH exists as Na" and OH ions in solution, write the equation for the reaction that Z mo occurs when NaOH is dissolved in water. Given the following heats of formation, M, m kJ per mole, as obtained from a table ofan, data, calculate AH for the reaction in Part (0). Compare your answer with the result you obtained in Part (e). NaOHs),-425.6; Na (aq).-240.1; OH (aq), -230. g. kJ/mol

Explanation / Answer

d)

Molar mass of NaOH = 23 + 16 + 1 = 40 gm/mol

q(reaction) = -qH2O = -49.72 * 4.184 * (50.1-23.7) = -5491.5 J

Delta H(dissolution) per 1 g of NaOH = 5491.5 * 1/4.98 = 1102.71 J/g = 1.102 kJ/g

e)

Delta H(dissolution) per mole = Delta H(dissolution) per 1 g of NaOH * Molar mass of NaOH

=> 1.102 kJ/g* 40.0 g/mol

=> 44.1 kJ/mol

f)

The reaction will be

NaOH(aq) ----------- Na+(aq) + OH-(aq)

g)

The reaction will be

Na+(aq) + OH-(aq) ----------- NaOH(aq)

Delta H(rxn) = Delta H(products) - Delta H(reactants) = -425.6 + 230 + 240.1 = 44.5 kJ/mol

The answer is very close to the answer obtained in part C

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.