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.) The temperature of the water bath is monitored, and it is determined from this data that 124. kJ of heat flows out of the system during the reaction. The position of the piston is also monitored, and it is determined from this data that the piston does 382. kJ of work on the system 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 the reaction absorb or release energy? How much energy does the reaction absorb or release? Round your answer to 3 significant digits. exothermic endothermic up down neither in out neither absorb release neither 0x10 X Ś 1 atm pressure attl gases piston cylinder water bath E OL E

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.) The temperature of the water bath is monitored, and it is determined from this data that 124. kJ of heat flows out of the system during the reaction. The position of the piston is also monitored, and it is determined from this data that the piston does 382. kJ of work on the system 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 the reaction absorb or release energy? How much energy does the reaction absorb or release? Round your answer to 3 significant digits. exothermic endothermic up down neither in out neither absorb release neither 0x10 X Ś 1 atm pressure attl gases piston cylinder water bath E OL E

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 18P

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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 1atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.)From previous experiments, this chemical reaction is known to absorb 386.kJ of energy. The temperature of the water bath is monitored, and it is determined from this data that 181.kJ of heat flows out of the system during the reaction.
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 the 1 atm. The cylinder is also submerged in a large insulated water bath. From previous experiments, this chemical reaction is known to absord 105. kj of energy. The position of the piston is monitored, and it is determined from this data that the piston does 255. kj of work on the system during the reaction. Is the reaction exothermic or endothermic? (exothermic or endothermic) Does the temperature of the water bath go up or down? (up, down, neither) Does the piston move in or out? (in, out, neither) Does heat flow into or out of the gas mixture? (in, out, neither) How much heat flows? Round your answer to 3 significant digits.