Answered: -Thermometer Glass stirrer Cork stopper…

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) When a 4.25-g sample of solid ammonium nitrate dissolves
in 60.0 g of water in a coffee-cup calorimeter (Figure
5.18), the temperature drops from 22.0 to 16.9 °C. Calculate
ΔH (in kJ/mol NH₄NO₃) for the solution process:
NH₄NO₃(s)-----> NH4⁺(aq) + NO3 ^-(aq)
Assume that the specific heat of the solution is the same
as that of pure water. (b) Is this process endothermic or
exothermic?

-Thermometer
Glass stirrer
Cork stopper
Two Styrofoam®
cups nested together
Reaction mixture
in solution
Figure 5.18 Coffee-cup calorimeter.

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