# Energy Change in Chemical Reactions## Reaction OverviewA chemist measures the energy change, \( \Delta H \), during the following reaction:\[ \text{Cl}_2(g) + \text{H}_2(g) \rightarrow 2 \text{HCl}(g) \]\[ \Delta H = -184 \, \text{kJ} \]### Understanding the Reaction- This reaction releases energy, as indicated by the negative \( \Delta H \) value of \(-184 \, \text{kJ}\).## Questions and Analysis1. **This reaction is...** - [ ] Endothermic. - [x] Exothermic.2. **Suppose 66.1 g of \( \text{Cl}_2 \) react. Will any heat be released or absorbed?** - [ ] Yes, absorbed. - [x] Yes, released. - [ ] No.3. **If you said heat will be released or absorbed in the second part of this question, calculate how much heat will be released or absorbed.** - *Answer in* \(\text{kJ}\): \(\_\_\_\_\_\_\_\_\_\_\_\). *Be sure your answer has the correct number of significant digits.*## Graphical Explanation- A small calculator tool is depicted, designed to assist with the calculation, represented by options including a check box for multiplying by ten and a reset button.### Instructions- Use stoichiometry to calculate the heat change when 66.1 g of \( \text{Cl}_2 \) are used in the reaction.- Consider molar ratios and ensure you account for significant figures in your final answer.---This educational content helps learners understand exothermic reactions and how to quantify energy changes using stoichiometric calculations.

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A chemist measures the energy change AH during the following reaction: Cl₂(g)+H₂(g) → 2 HCl(g) ΔΗ= -184. kJ Use the information to answer the following questions. This reaction is... Suppose 66.1 g of Cl₂ react. Will any heat be released or absorbed? If you said heat will be released or absorbed in the second part of this question, calculate how much heat will be released or absorbed. Be sure your answer has the correct number of significant digits. endothermic. exothermic. Yes, absorbed. Yes, released. No. x10 X

A chemist measures the energy change AH during the following reaction: Cl₂(g)+H₂(g) → 2 HCl(g) ΔΗ= -184. kJ Use the information to answer the following questions. This reaction is... Suppose 66.1 g of Cl₂ react. Will any heat be released or absorbed? If you said heat will be released or absorbed in the second part of this question, calculate how much heat will be released or absorbed. Be sure your answer has the correct number of significant digits. endothermic. exothermic. Yes, absorbed. Yes, released. No. x10 X

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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