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Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Question 3

Transcribed Image Text:Show all your work and include appropriate units.
Q1. Calculate moles of NaC2H3O2 (s), then use greaction to calculate AHreaction for anhydrous sodium acetate
in kilojoules.
NaC2H3O2 (s)
→ Na*(aq) + C2H3O2 (aq)
greaction = 146 81/1000=0.146S1kg
mass of NaC2 HZH3OZ=lu2089
molar mass =82.03439/mol
moles = 1.208g/82.03439/m01) = 0.01473mol
AH= -(0.14681KT/0.01473méi
DHreaction=-9.970K)/mold
Q2. Calculate moles of NaC2H3O2 3H20 (s), then use greaction to calculate AHreaction for sodium acetate
trihydrate in kJ.
NaC2H3O2 3H20 (s) → Na*(aq) + C2H3O2 (aq) + 3 H20(1)
1.2509
136.08glmoi = O. 009z mol
ニ 4.469
485.76)/mol
O.0097mol
Oo 0o dz moles of
He a +reaction ok
0.486K)
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 3H2O(s)
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