Be sure to answer all parts. A mercury mirror forms inside a test tube as a result of the thermal decomposition of mercury oxide: 2 HgO(s) 2 Hg(l) + O2(g) = 181.6 kJ (a) How much heat is needed to decompose 570. g of the oxide? kJ (b) If 327 kJ of heat is absorbed, how many grams of Hg form? x 10 g Hg (Enter your answer in scientific notation.)

Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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**Educational Website Content:**

### Topic: Thermal Decomposition of Mercury Oxide

**Introduction:**
A mercury mirror forms inside a test tube as a result of the thermal decomposition of mercury(II) oxide.

**Chemical Reaction:**
\[ 2 \, \text{HgO}(s) \rightarrow 2 \, \text{Hg}(l) + \text{O}_2(g) \]

**Enthalpy Change:**
\[ \Delta H_{\text{rxn}} = 181.6 \, \text{kJ} \]

**Problem Statement:**

**(a) Calculation of Heat Requirement:**
- **Question:** How much heat is needed to decompose 570 g of the oxide?
- **Solution Box:** \( \_\_\_\_ \, \text{kJ} \)

**(b) Mass from Heat Absorption:**
- **Question:** If 327 kJ of heat is absorbed, how many grams of Hg form?
- **Solution Box:** \( \_\_\_ \times 10^{\_\_\_} \, \text{g Hg} \) (Enter your answer in scientific notation.)

This problem involves applying concepts of chemical thermodynamics to calculate the energy requirement and product mass in reactions involving mercury(II) oxide.
Transcribed Image Text:**Educational Website Content:** ### Topic: Thermal Decomposition of Mercury Oxide **Introduction:** A mercury mirror forms inside a test tube as a result of the thermal decomposition of mercury(II) oxide. **Chemical Reaction:** \[ 2 \, \text{HgO}(s) \rightarrow 2 \, \text{Hg}(l) + \text{O}_2(g) \] **Enthalpy Change:** \[ \Delta H_{\text{rxn}} = 181.6 \, \text{kJ} \] **Problem Statement:** **(a) Calculation of Heat Requirement:** - **Question:** How much heat is needed to decompose 570 g of the oxide? - **Solution Box:** \( \_\_\_\_ \, \text{kJ} \) **(b) Mass from Heat Absorption:** - **Question:** If 327 kJ of heat is absorbed, how many grams of Hg form? - **Solution Box:** \( \_\_\_ \times 10^{\_\_\_} \, \text{g Hg} \) (Enter your answer in scientific notation.) This problem involves applying concepts of chemical thermodynamics to calculate the energy requirement and product mass in reactions involving mercury(II) oxide.
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