Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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![**Thermodynamics and Heat Calculations**
1. **Specific Heat Capacity Calculation**
- If 6.95 kJ of heat is applied to a 1012-g block of metal, and the temperature of the metal increases by 11.4°C, calculate the specific heat capacity of the metal in J/g°C.
2. **Thermochemical Reaction for Kerosene**
- Consider the following reaction for kerosene:
\[
2 \, \text{C}_{12}\text{H}_{26}(l) + 37 \, \text{O}_2(g) \rightarrow 24 \, \text{CO}_2(g) + 26 \, \text{H}_2\text{O}(l) \, \Delta H = -15,026 \, \text{kJ}
\]
a. **Equivalence Statements**
- Write all 4 equivalence statements using the enthalpy of the reaction (energy to mole amounts).
b. **Energy Level Diagram**
- Explain an energy level diagram for this process.
c. **Heat Released for CO₂ Production**
- When 43.2 g of CO₂ are made, how much heat is released? (Hint: Write the energy as an equivalent statement with moles like shown in class.)
d. **Reactant Consumption**
- If 2500. kJ of heat is released by the reaction, how many grams of C₁₂H₂₆ must have been consumed/used?
e. **Heat Generation Requirement**
- If this reaction were being used to generate heat, how many grams of C₁₂H₂₆ would have to be reacted to generate enough heat to raise the temperature of 250 g of liquid water by 50°C?
**Graph Explanation:**
The document includes an energy level diagram which would typically display the reactants and products, showing the energy change (ΔH) during the reaction. The diagram might illustrate the energy released, with a downward slope from reactants to products, indicating an exothermic reaction.](https://content.bartleby.com/qna-images/question/6c605e87-2c96-4aa2-99a1-2c5d12ea3556/52161bb7-e425-4144-8a02-bb523735d39c/5jgu9t4_processed.jpeg)
Transcribed Image Text:**Thermodynamics and Heat Calculations**
1. **Specific Heat Capacity Calculation**
- If 6.95 kJ of heat is applied to a 1012-g block of metal, and the temperature of the metal increases by 11.4°C, calculate the specific heat capacity of the metal in J/g°C.
2. **Thermochemical Reaction for Kerosene**
- Consider the following reaction for kerosene:
\[
2 \, \text{C}_{12}\text{H}_{26}(l) + 37 \, \text{O}_2(g) \rightarrow 24 \, \text{CO}_2(g) + 26 \, \text{H}_2\text{O}(l) \, \Delta H = -15,026 \, \text{kJ}
\]
a. **Equivalence Statements**
- Write all 4 equivalence statements using the enthalpy of the reaction (energy to mole amounts).
b. **Energy Level Diagram**
- Explain an energy level diagram for this process.
c. **Heat Released for CO₂ Production**
- When 43.2 g of CO₂ are made, how much heat is released? (Hint: Write the energy as an equivalent statement with moles like shown in class.)
d. **Reactant Consumption**
- If 2500. kJ of heat is released by the reaction, how many grams of C₁₂H₂₆ must have been consumed/used?
e. **Heat Generation Requirement**
- If this reaction were being used to generate heat, how many grams of C₁₂H₂₆ would have to be reacted to generate enough heat to raise the temperature of 250 g of liquid water by 50°C?
**Graph Explanation:**
The document includes an energy level diagram which would typically display the reactants and products, showing the energy change (ΔH) during the reaction. The diagram might illustrate the energy released, with a downward slope from reactants to products, indicating an exothermic reaction.
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