A student dissolves 14.1 g of sodium chloride (NaCl) in 300. g of water in a well-insulated open cup. She then observes the temperature of the water fall from 22.0 °C to 20.5 °C over the course of 4.1 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: NaCl(s) → Na"(aq) + Cl (aq) You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to 2 significant digits. Note for advanced students: it's possible the student did not do the experiment carefully, and the values you calculate may not be the same as the known and published values for this reaction. O exothermic Is this reaction exothermic, endothermic, or neither? O endothermic O neither If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case. kJ Calculate the reaction enthalpy AH per mole of NaCl. rxn mol
A student dissolves 14.1 g of sodium chloride (NaCl) in 300. g of water in a well-insulated open cup. She then observes the temperature of the water fall from 22.0 °C to 20.5 °C over the course of 4.1 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: NaCl(s) → Na"(aq) + Cl (aq) You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to 2 significant digits. Note for advanced students: it's possible the student did not do the experiment carefully, and the values you calculate may not be the same as the known and published values for this reaction. O exothermic Is this reaction exothermic, endothermic, or neither? O endothermic O neither If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case. kJ Calculate the reaction enthalpy AH per mole of NaCl. rxn mol
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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![**Dissolution of Sodium Chloride in Water Experiment**
**Instruction:**
A student dissolves 14.1 g of sodium chloride (NaCl) in 300 g of water in a well-insulated open cup. She then observes the temperature of the water fall from 22.0 °C to 20.5 °C over the course of 4.1 minutes.
Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction:
\[ \text{NaCl} (s) \rightarrow \text{Na}^+ (aq) + \text{Cl}^- (aq) \]
You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to 2 significant digits.
**Note for advanced students:** It's possible the student did not do the experiment carefully, and the values you calculate may not be the same as the known and published values for this reaction.
**Questions:**
1. **Is this reaction exothermic, endothermic, or neither?**
- Exothermic
- Endothermic
- Neither
2. **If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case.**
- Answer: \[\_\_\_\_\_\_\_\_\_\_ \text{kJ}\]
3. **Calculate the reaction enthalpy \(\Delta H\_{\text{rxn}}\) per mole of NaCl.**
- Answer: \[\_\_\_\_\_\_\_\_\_\_ \frac{\text{kJ}}{\text{mol}}\]
**Additional Tools:**
- Interactive checkbox to mark if the reaction is exothermic, endothermic, or neither.
- Blocks to input calculated values for heat released or absorbed (\[\text{kJ}\]) and reaction enthalpy (\[\frac{\text{kJ}}{\text{mol}}\]).
**Note:**
- An option is available to multiply the result by 10, undo the last action, or get help.
**Explanation of graphical elements:**
- **Checkboxes:** Allow the student to select whether the reaction is exothermic, endothermic, or neither.
- **Input fields:** Students can enter the calculated amount of heat released or absorbed (in kJ) and](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F88a4d88f-5648-4e4d-a49c-10af3e87c66c%2Fe67ed1e2-45f0-4d5f-9c61-6c7ad4007bab%2Fzz3fisr_processed.png&w=3840&q=75)
Transcribed Image Text:**Dissolution of Sodium Chloride in Water Experiment**
**Instruction:**
A student dissolves 14.1 g of sodium chloride (NaCl) in 300 g of water in a well-insulated open cup. She then observes the temperature of the water fall from 22.0 °C to 20.5 °C over the course of 4.1 minutes.
Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction:
\[ \text{NaCl} (s) \rightarrow \text{Na}^+ (aq) + \text{Cl}^- (aq) \]
You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to 2 significant digits.
**Note for advanced students:** It's possible the student did not do the experiment carefully, and the values you calculate may not be the same as the known and published values for this reaction.
**Questions:**
1. **Is this reaction exothermic, endothermic, or neither?**
- Exothermic
- Endothermic
- Neither
2. **If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case.**
- Answer: \[\_\_\_\_\_\_\_\_\_\_ \text{kJ}\]
3. **Calculate the reaction enthalpy \(\Delta H\_{\text{rxn}}\) per mole of NaCl.**
- Answer: \[\_\_\_\_\_\_\_\_\_\_ \frac{\text{kJ}}{\text{mol}}\]
**Additional Tools:**
- Interactive checkbox to mark if the reaction is exothermic, endothermic, or neither.
- Blocks to input calculated values for heat released or absorbed (\[\text{kJ}\]) and reaction enthalpy (\[\frac{\text{kJ}}{\text{mol}}\]).
**Note:**
- An option is available to multiply the result by 10, undo the last action, or get help.
**Explanation of graphical elements:**
- **Checkboxes:** Allow the student to select whether the reaction is exothermic, endothermic, or neither.
- **Input fields:** Students can enter the calculated amount of heat released or absorbed (in kJ) and
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