What does the word "closed system" indicate about the calorimeter? What is the term given to reactions that release energy? If energy is released by the reaction that is taking place, where will the heat be transferred to? What will happen to the temperature of the surrounding water in the calorimeter?

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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**Model 4**

Calorimetry involves the measurement of heat flow from one object (often the system) to another (often the surroundings). The instrument chemists use to measure changes in heat energy is called a calorimeter. The calorimeter is composed of an insulated container (like a Styrofoam cup) containing a measured mass of water. A thermometer rests in the water. A reaction vessel is also placed inside the water – this is where the reaction actually occurs. The reaction vessel is surrounded by the measured mass of water. We will assume that the calorimeter is a closed system where all the energy released by one object is absorbed by the other and vice versa.

**Diagram Explanation:**
The diagram depicts a calorimeter setup:
- **Thermometer**: Positioned vertically to measure the temperature of the water.
- **Reaction Vessel**: Placed inside the water within the calorimeter.
- **Calorimeter**: An insulated container holding the system.
- **Heat Flow Arrows**: Indicate heat lost by the reaction vessel and heat gained by the water.

**Questions:**

1. **What does the word "closed system" indicate about the calorimeter?**

2. **What is the term given to reactions that release energy?**

3. **If energy is released by the reaction that is taking place, where will the heat be transferred to?**

4. **What will happen to the temperature of the surrounding water in the calorimeter?**

5. **What is the term given to reactions that absorb energy?**
Transcribed Image Text:**Model 4** Calorimetry involves the measurement of heat flow from one object (often the system) to another (often the surroundings). The instrument chemists use to measure changes in heat energy is called a calorimeter. The calorimeter is composed of an insulated container (like a Styrofoam cup) containing a measured mass of water. A thermometer rests in the water. A reaction vessel is also placed inside the water – this is where the reaction actually occurs. The reaction vessel is surrounded by the measured mass of water. We will assume that the calorimeter is a closed system where all the energy released by one object is absorbed by the other and vice versa. **Diagram Explanation:** The diagram depicts a calorimeter setup: - **Thermometer**: Positioned vertically to measure the temperature of the water. - **Reaction Vessel**: Placed inside the water within the calorimeter. - **Calorimeter**: An insulated container holding the system. - **Heat Flow Arrows**: Indicate heat lost by the reaction vessel and heat gained by the water. **Questions:** 1. **What does the word "closed system" indicate about the calorimeter?** 2. **What is the term given to reactions that release energy?** 3. **If energy is released by the reaction that is taking place, where will the heat be transferred to?** 4. **What will happen to the temperature of the surrounding water in the calorimeter?** 5. **What is the term given to reactions that absorb energy?**
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