Onverting liquid water to solid ice releases 1.44 kcal/mol (6.02 J/mol). Type here to search C 0 Part C How many kilocalories are released by freezing 4.3 mol of H₂O? Express your answer using two significant figures. VE ΑΣΦΑ Submit Part D Request Answer → ? How many kilocalories are released by freezing 23 g of H₂O? Express your answer using two significant figures. 15. ΑΣΦ Submit Request Answer kcal ? kcal

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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**Educational Text Transcription:**

### Thermodynamic Calculations: Heat Release in Freezing Water

#### Introduction
Understanding the energy changes involved in phase transitions is crucial in thermodynamics. When water freezes, energy is released in the form of heat. This process can be quantified using kilocalories per mole.

**Given Data:**
- Converting liquid water to solid ice releases \( 1.4 \, \text{kcal/mol} \).

#### Problem Statement

**Part C:**
- **Question**: How many kilocalories are released by freezing \( 4.3 \, \text{mol} \) of \( \text{H}_2\text{O} \)?
- **Instruction**: Express your answer using two significant figures.

**Part D:**
- **Question**: How many kilocalories are released by freezing \( 23 \, \text{g} \) of \( \text{H}_2\text{O} \)?
- **Instruction**: Express your answer using two significant figures.

#### Answer Boxes:
- **For both parts**, there are text input fields where students can enter their answers in kilocalories, along with a 'Submit' button and a 'Request Answer' link for additional assistance.

By solving these problems, students will enhance their understanding of energy changes during phase transitions and practice using significant figures in calculations.
Transcribed Image Text:**Educational Text Transcription:** ### Thermodynamic Calculations: Heat Release in Freezing Water #### Introduction Understanding the energy changes involved in phase transitions is crucial in thermodynamics. When water freezes, energy is released in the form of heat. This process can be quantified using kilocalories per mole. **Given Data:** - Converting liquid water to solid ice releases \( 1.4 \, \text{kcal/mol} \). #### Problem Statement **Part C:** - **Question**: How many kilocalories are released by freezing \( 4.3 \, \text{mol} \) of \( \text{H}_2\text{O} \)? - **Instruction**: Express your answer using two significant figures. **Part D:** - **Question**: How many kilocalories are released by freezing \( 23 \, \text{g} \) of \( \text{H}_2\text{O} \)? - **Instruction**: Express your answer using two significant figures. #### Answer Boxes: - **For both parts**, there are text input fields where students can enter their answers in kilocalories, along with a 'Submit' button and a 'Request Answer' link for additional assistance. By solving these problems, students will enhance their understanding of energy changes during phase transitions and practice using significant figures in calculations.
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