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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.

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.

Principles of Modern Chemistry
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter12: Thermodynamic Processes And Thermochemistry
Section: Chapter Questions
Problem 42P
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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 204. kJ of energy. The position of the piston is monitored, and it is determined from this data that the system does 240. kJ of work on the piston during the reaction.
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 204. kJ of energy. The position of the piston is monitored, and it is determined from this data that the system does 240. kJ of work on the piston during the reaction. Is the reaction exothermic or endothermic? Does the temperature of the water bath go up or down? Does the piston move in or out? Does heat flow into or out of the gas mixture? Explanation Check exothermic O endothermic up O down Oneither in out Oneither O in O out Oneither 1 atm pressure gases 1/5 piston cylinder Kristina water bath S ob As g
Transcribed Image Text: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 204. kJ of energy. The position of the piston is monitored, and it is determined from this data that the system does 240. kJ of work on the piston during the reaction. Is the reaction exothermic or endothermic? Does the temperature of the water bath go up or down? Does the piston move in or out? Does heat flow into or out of the gas mixture? Explanation Check exothermic O endothermic up O down Oneither in out Oneither O in O out Oneither 1 atm pressure gases 1/5 piston cylinder Kristina water bath S ob As g
Is the reaction exothermic or, endothermic? Does the temperature of the water bath go up or down? Does the piston move in or out? Does heat flow into or out of the gas mixture? How much heat flows? Be sure your answer has the correct number of significant digits. exothermic O endothermic up Odown neither O in out Oneither O in out Oneither x10 X $
Transcribed Image Text:Is the reaction exothermic or, endothermic? Does the temperature of the water bath go up or down? Does the piston move in or out? Does heat flow into or out of the gas mixture? How much heat flows? Be sure your answer has the correct number of significant digits. exothermic O endothermic up Odown neither O in out Oneither O in out Oneither x10 X $
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