Q4. Another way to calculate AH values that cannot be measured experimentally is with standard heats of formation. a) Using the AH,° values provided, calculate AHxn for NaC2H3O2(s) +3 H20(1) → NaC2H3O2 3H20(s) with the equation: ΔΗΟΣn, ΔΗΡ(products)-Σn, ΔΗΡ(reactants) AH nan= (1 motx(-1604K))-Imol x (-70 8.YKJ+3m NaC2H3O2(s) NaC2H3O2 3H2O(s) H2O(I) AH:° (kJ/mol) - 708.8 - 1604 - 285.8 = (Imolx(-koyks-(imalx(-70x.sk) +3molxt255.7 met mol incl = IG04KJ-(156602KJ) (-1604 t15 e Gi2)K b) Compare your value from 4a) to your expertmèntally determined value in Q3. Detełmine the percent error.

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Q3. Use Hess' Law and the results from questions 1 and 2 to find the enthalpy of hydration (AHreaction) for
anhydrous sodium acetate in kJ. Show your work clearly - rewrite transformed reaction steps from
questions 1 and 2 above.
NaC2H3O2(s) + 3 H20(1) → NaC2H3O2 3H20(s)
Nacz Hy Oz ls) 7 yat + (2H307 94
+ 3H20 7NQC2 H3O3
99
人H, + At,
H reac tion = [-q.970+(485.7)Jk)
A4 。
reaction = -495.71KJ
loo
Transcribed Image Text:O.486k) Q3. Use Hess' Law and the results from questions 1 and 2 to find the enthalpy of hydration (AHreaction) for anhydrous sodium acetate in kJ. Show your work clearly - rewrite transformed reaction steps from questions 1 and 2 above. NaC2H3O2(s) + 3 H20(1) → NaC2H3O2 3H20(s) Nacz Hy Oz ls) 7 yat + (2H307 94 + 3H20 7NQC2 H3O3 99 人H, + At, H reac tion = [-q.970+(485.7)Jk) A4 。 reaction = -495.71KJ loo
Q4. Another way to calculate AH values that cannot be measured experimentally is with standard heats of formation.
a) Using the AH;° values provided, calculate AH20 for NaC2H3O2(s) + 3 H20(1) → NaC2H3O2 3H2O(s) with the equation:
ΔΗ Σn, ΔΗΡ(products) -Σn, ΔΗΡ(reactants)
NaC2H3O2(s)
NaC2H3O2 3H2O(s)
H20(1)
AH: (kJ/mol)
- 708.8
- 1604
- 285.8
AHi man= (1 motx/-1604k))-Imo lx (-70 8.YKJ+3mo
X AH(H0)
-(imolx(-koyk))-(imolxl-70r.sk)
+ 3molx t255.5
mel
mol
incl
IG04KJ-(-15.6602 KJ)
(-1604 +15 o 6,2)K
%3D
determined value in Q3. Determine the percent error.
Transcribed Image Text:Q4. Another way to calculate AH values that cannot be measured experimentally is with standard heats of formation. a) Using the AH;° values provided, calculate AH20 for NaC2H3O2(s) + 3 H20(1) → NaC2H3O2 3H2O(s) with the equation: ΔΗ Σn, ΔΗΡ(products) -Σn, ΔΗΡ(reactants) NaC2H3O2(s) NaC2H3O2 3H2O(s) H20(1) AH: (kJ/mol) - 708.8 - 1604 - 285.8 AHi man= (1 motx/-1604k))-Imo lx (-70 8.YKJ+3mo X AH(H0) -(imolx(-koyk))-(imolxl-70r.sk) + 3molx t255.5 mel mol incl IG04KJ-(-15.6602 KJ) (-1604 +15 o 6,2)K %3D determined value in Q3. Determine the percent error.
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