B Which of the following statements about the chemical reaction is best supported using the data from the experiment? C Mass of packet mixture Temperature of water D The reaction is exothermic because the temperature of the water increased during the reaction. The reaction is exothermic because the mass of the mixture increased during the reaction. The reaction is endothermic because the temperature of the water increased during the reaction. 10.0 g 21°C The reaction is endothermic because the mass of the mixture increased during the reaction. 14.3 g 28°C
B Which of the following statements about the chemical reaction is best supported using the data from the experiment? C Mass of packet mixture Temperature of water D The reaction is exothermic because the temperature of the water increased during the reaction. The reaction is exothermic because the mass of the mixture increased during the reaction. The reaction is endothermic because the temperature of the water increased during the reaction. 10.0 g 21°C The reaction is endothermic because the mass of the mixture increased during the reaction. 14.3 g 28°C
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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Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
Question
Certain types of sealed packets can be used to warm up or cool down objects. Some packets are activated by unsealing them and exposing their contents to air. To investigate the reaction that
occurs inside a packet, a student weighs the materials in the packet, places those materials in a small beaker. surrounds the beaker with a larger beaker of water, and adds a thermometer to the water, as shown in the figure. The student records the following data and then measures a final weight upon completion of the experiment
Transcribed Image Text:Question 8
Inner Beaker with
Mixture from
Packet
Mass of packet mixture
Temperature of water
Thermometer
Certain types of sealed packets can be used to warm up or cool down objects. Some packets are activated by unsealing them and exposing their contents to air. To investigate the reaction that occurs inside a packet, a
student weighs the materials in the packet, places those materials in a small beaker, surrounds the beaker with a larger beaker of water, and adds a thermometer to the water, as shown in the figure. The student records
the following data and then measures a final weight upon completion of the experiment.
Initial Value
10.0 g
21°C
Outer Beaker
with Water
Final Value
14.3 g
28°C
Transcribed Image Text:A
Which of the following statements about the chemical reaction is best supported using the data from the experiment?
The reaction is exothermic because the temperature of the water increased during the reaction.
B
C
Mass of packet mixture
Temperature of water
D
The reaction is exothermic because the mass of the mixture increased during the reaction.
The reaction is endothermic because the temperature of the water increased during the reaction.
Initial value
10.0 g
21°C
The reaction is endothermic because the mass of the mixture increased during the reaction.
14.3 g
28°C
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