Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
a. Calculate the theoretical heat of reaction between the Zn and copper sulphate using the following enthalpy of formations:
Formula is: ΔH0rxn = ∑nΔH0f (products) - ∑n (reactants)
Zn(s) – (0 kJ/mol)
ZnSO4 (aq) - (-152.4kJ/mol)
Cu(s) – (0 kJ/mol)
CuSO4 (aq) – (64.77 kJ/mol)
b. In an experiment, 2 grams of zinc and 150 mL aq CuSO4 were made to react, then as observed, the temperature rises from 300C to 410C. What is the heat of the reaction between the zinc and copper sulphate (in kJ/mole)? Is the value near the theoretical value (found in item a)?
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