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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 241 kJ of energy. The position of the piston is monitored, and it is determined from this data that the system does 133 kJ of work on the piston during the reaction. **Questions:** 1. Is the reaction exothermic or endothermic? - [ ] exothermic - [ ] endothermic 2. Does the temperature of the water bath go up, or down? - [ ] up - [ ] down - [ ] neither 3. Does the piston move in or out? - [ ] in - [ ] out - [ ] neither 4. Does heat flow into or out of the gas mixture? - [ ] in - [ ] out - [ ] neither 5. How much heat flows? Round your answer to 3 significant digits. - [ ] kJ **Diagram Explanation:** The sketch to the right shows a cylinder with a movable piston on top. The system is at 1 atm pressure. The gases inside the cylinder undergo a chemical reaction that involves a change in volume, causing the piston to move in or out to maintain constant pressure. The setup is submerged in a water bath, which is insulated, indicating that heat exchange with the surroundings is prevented. **Interactive Elements:** There are options provided for answering the questions, with an "Explanation" and "Check" button available for further guidance or feedback on the responses. © 2021 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center

**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 241 kJ of energy. The position of the piston is monitored, and it is determined from this data that the system does 133 kJ of work on the piston during the reaction. **Questions:** 1. Is the reaction exothermic or endothermic? - [ ] exothermic - [ ] endothermic 2. Does the temperature of the water bath go up, or down? - [ ] up - [ ] down - [ ] neither 3. Does the piston move in or out? - [ ] in - [ ] out - [ ] neither 4. Does heat flow into or out of the gas mixture? - [ ] in - [ ] out - [ ] neither 5. How much heat flows? Round your answer to 3 significant digits. - [ ] kJ **Diagram Explanation:** The sketch to the right shows a cylinder with a movable piston on top. The system is at 1 atm pressure. The gases inside the cylinder undergo a chemical reaction that involves a change in volume, causing the piston to move in or out to maintain constant pressure. The setup is submerged in a water bath, which is insulated, indicating that heat exchange with the surroundings is prevented. **Interactive Elements:** There are options provided for answering the questions, with an "Explanation" and "Check" button available for further guidance or feedback on the responses. © 2021 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center

Chemistry
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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**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 241 kJ of energy. The position of the piston is monitored, and it is determined from this data that the system does 133 kJ of work on the piston during the reaction. **Questions:** 1. Is the reaction exothermic or endothermic? - [ ] exothermic - [ ] endothermic 2. Does the temperature of the water bath go up, or down? - [ ] up - [ ] down - [ ] neither 3. Does the piston move in or out? - [ ] in - [ ] out - [ ] neither 4. Does heat flow into or out of the gas mixture? - [ ] in - [ ] out - [ ] neither 5. How much heat flows? Round your answer to 3 significant digits. - [ ] kJ **Diagram Explanation:** The sketch to the right shows a cylinder with a movable piston on top. The system is at 1 atm pressure. The gases inside the cylinder undergo a chemical reaction that involves a change in volume, causing the piston to move in or out to maintain constant pressure. The setup is submerged in a water bath, which is insulated, indicating that heat exchange with the surroundings is prevented. **Interactive Elements:** There are options provided for answering the questions, with an "Explanation" and "Check" button available for further guidance or feedback on the responses. © 2021 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center
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 241 kJ of energy. The position of the piston is monitored, and it is determined from this data that the system does 133 kJ of work on the piston during the reaction. **Questions:** 1. Is the reaction exothermic or endothermic? - [ ] exothermic - [ ] endothermic 2. Does the temperature of the water bath go up, or down? - [ ] up - [ ] down - [ ] neither 3. Does the piston move in or out? - [ ] in - [ ] out - [ ] neither 4. Does heat flow into or out of the gas mixture? - [ ] in - [ ] out - [ ] neither 5. How much heat flows? Round your answer to 3 significant digits. - [ ] kJ **Diagram Explanation:** The sketch to the right shows a cylinder with a movable piston on top. The system is at 1 atm pressure. The gases inside the cylinder undergo a chemical reaction that involves a change in volume, causing the piston to move in or out to maintain constant pressure. The setup is submerged in a water bath, which is insulated, indicating that heat exchange with the surroundings is prevented. **Interactive Elements:** There are options provided for answering the questions, with an "Explanation" and "Check" button available for further guidance or feedback on the responses. © 2021 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center
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