A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) From previous experiments, this chemical reaction is known to release 141. kJ of energy. The position of the piston is monitored, and it is determined from this data that the piston does 358. kJ of work on the system during the reaction. exothermic Is the reaction exothermic or endothermic? endothermic up Does the temperature of the water bath go up or down? down neither in Does the piston move in or out? out neither in Does heat flow into or out of the gas mixture? out neither How miuch hest flows? Re eire Vour anewer hae n..
A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) From previous experiments, this chemical reaction is known to release 141. kJ of energy. The position of the piston is monitored, and it is determined from this data that the piston does 358. kJ of work on the system during the reaction. exothermic Is the reaction exothermic or endothermic? endothermic up Does the temperature of the water bath go up or down? down neither in Does the piston move in or out? out neither in Does heat flow into or out of the gas mixture? out neither How miuch hest flows? Re eire Vour anewer hae n..
Principles of Instrumental Analysis
7th Edition
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Chapter34: Particle Size Determination
Section: Chapter Questions
Problem 34.12QAP
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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.
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Transcribed Image Text:Understand
The pos v of the piston is monitored, and it is determined from t
system auring the reaction.
exothermic
Is the reaction exothermic or endothermic?
endothermic
up
Does the temperature of the water bath go up or
down?
down
neither
in
Does the piston move in or out?
O out
neither
O in
Does heat flow into or out of the gas mixture?
O out
neither
How much heat flows? Be sure your answer has
the correct number of significant digits.
I kJ
Explanation
Check
MAR
14
Transcribed Image Text:e File
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Understanding the definitions of heat and work
A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The
cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The
cylinder is also submerged in a large insulated water bath. (See sketch at right.)
From previous experiments, this chemical reaction is known to release 141. kJ of energy.
The position of the piston is monitored, and it is determined from this data that the piston does 358. kJ of work on the
system during the reaction.
O exothermic
Is the reaction exothermic or endothermic?
O endothermic
O up
Does the temperature of the water bath go up or
down?
O down
O neither
O in
Does the piston move in or out?
O out
O neither
O in
Does heat flow into or out of the gas mixture?
O out
O neither
How much heat flows? Re eure Vour anCIwer has
n..
Explanation
Check
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