The class of engineering students was asked to observed the concept of coffee-cup calorimeter. The instructor perform the following procedures: a 100.0 mL hydrochloric acid heated at 44.6 °C was mixed with 100.0-g pre- weighed water at room temperature. Laboratory temperature measured real-time is 24.6 °C. The reaction is then allowed to come to equilibrium with temperature of both substances at 31.3 °C. a) Based on the experiment performed, was the reaction exothermic or endothermic? Support your answer. b) By calorimetry, how much heat was released or absorbed. Show complete solution with answer in 2 significant figures.
The class of engineering students was asked to observed the concept of coffee-cup calorimeter. The instructor perform the following procedures: a 100.0 mL hydrochloric acid heated at 44.6 °C was mixed with 100.0-g pre- weighed water at room temperature. Laboratory temperature measured real-time is 24.6 °C. The reaction is then allowed to come to equilibrium with temperature of both substances at 31.3 °C. a) Based on the experiment performed, was the reaction exothermic or endothermic? Support your answer. b) By calorimetry, how much heat was released or absorbed. Show complete solution with answer in 2 significant figures.
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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The class of engineering students was asked to observed the concept of coffee-cup calorimeter. The instructor perform the following procedures: a 100.0 mL hydrochloric acid heated at 44.6 °C was mixed with 100.0-g pre- weighed water at room temperature. Laboratory temperature measured real-time is 24.6 °C. The reaction is then allowed to come to equilibrium with temperature of both substances at 31.3 °C.
a) Based on the experiment performed, was the reaction exothermic or endothermic? Support your answer.
b) By calorimetry, how much heat was released or absorbed. Show complete solution with answer in 2 significant figures.
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