Question
How many Carbon - Hydrogen bonds are in each molecule of methane? ______ (10 pts)
If there's 1652 kJ of bond energy in methane, how much energy is there in one C -H bond? _______ kJ (10 pts)
If there’s more bond energy in the reactants than the products, that reaction is ___thermic.(10 pts)
If there’s less bond energy in the reactants than the products, that reaction is
___thermic.(10 pts)
There are about 800 kJ/ mol of energy in the C=O bond in carbon dioxide There are about 500 kJ/ mol of energy in the O=O bond in oxygen gas. Carbon alone has no bonds (so no bond energy).
When carbon and oxygen react ________ kJ of energy are __________ So the reaction is ____thermic. (released or absorbed?)
The figure below represents the energy in the chemical bonds in a pile of firewood. Replace the “X”s with the appropriate number (the first one is done for you): (10 pts per X)
1. A pile of cold (low energy) ashes
2. A neatly stacked pile of wood
3. A roaring fire
4. Burning kindling begins to add energy to the pile
5. A pile of hot (but cooling) coals
give the answers for each question
If there's 1652 kJ of bond energy in methane, how much energy is there in one C -H bond? _______ kJ (10 pts)
If there’s more bond energy in the reactants than the products, that reaction is ___thermic.(10 pts)
If there’s less bond energy in the reactants than the products, that reaction is
___thermic.(10 pts)
There are about 800 kJ/ mol of energy in the C=O bond in carbon dioxide There are about 500 kJ/ mol of energy in the O=O bond in oxygen gas. Carbon alone has no bonds (so no bond energy).
When carbon and oxygen react ________ kJ of energy are __________ So the reaction is ____thermic. (released or absorbed?)
The figure below represents the energy in the chemical bonds in a pile of firewood. Replace the “X”s with the appropriate number (the first one is done for you): (10 pts per X)
1. A pile of cold (low energy) ashes
2. A neatly stacked pile of wood
3. A roaring fire
4. Burning kindling begins to add energy to the pile
5. A pile of hot (but cooling) coals
give the answers for each question
Answers
GPT-4o mini
1. **How many Carbon - Hydrogen bonds are in each molecule of methane?**
**Answer:** 4
2. **If there's 1652 kJ of bond energy in methane, how much energy is there in one C-H bond?**
**Answer:** 413 kJ (since 1652 kJ / 4 bonds = 413 kJ per bond)
3. **If there’s more bond energy in the reactants than the products, that reaction is ___thermic.**
**Answer:** Exothermic.
4. **If there’s less bond energy in the reactants than the products, that reaction is ___thermic.**
**Answer:** Endothermic.
5. **When carbon and oxygen react, ________ kJ of energy are __________. So the reaction is ____thermic.**
**Answer:** 300 kJ of energy are **released**. So the reaction is **exothermic**.
(This is based on the bond energies provided: 800 kJ/mol for C=O bonds and 500 kJ/mol for O=O bonds, leading to a net energy release when forming CO2 from C and O2.)
6. **The figure below represents the energy in the chemical bonds in a pile of firewood. Replace the “X”s with the appropriate number:**
Since I can't see the figure you're referring to, I'll provide general descriptions for each point. Please adapt as necessary based on the specific energy contexts mentioned in the figure:
- **1. A pile of cold (low energy) ashes:** **Low energy** – (Assumed to have minimal chemical energy as the reaction has completed.)
- **2. A neatly stacked pile of wood:** **Moderate energy** – (The chemical potential energy is higher than ashes but not yet released.)
- **3. A roaring fire:** **High energy** – (Significant energy is released as wood burns.)
- **4. Burning kindling begins to add energy to the pile:** **Increasing energy** – (Adding energy to initiate combustion.)
- **5. A pile of hot (but cooling) coals:** **Lowering energy** – (Still high energy but gradually losing heat.)
Let me know if you need further clarifications or adjustments!
**Answer:** 4
2. **If there's 1652 kJ of bond energy in methane, how much energy is there in one C-H bond?**
**Answer:** 413 kJ (since 1652 kJ / 4 bonds = 413 kJ per bond)
3. **If there’s more bond energy in the reactants than the products, that reaction is ___thermic.**
**Answer:** Exothermic.
4. **If there’s less bond energy in the reactants than the products, that reaction is ___thermic.**
**Answer:** Endothermic.
5. **When carbon and oxygen react, ________ kJ of energy are __________. So the reaction is ____thermic.**
**Answer:** 300 kJ of energy are **released**. So the reaction is **exothermic**.
(This is based on the bond energies provided: 800 kJ/mol for C=O bonds and 500 kJ/mol for O=O bonds, leading to a net energy release when forming CO2 from C and O2.)
6. **The figure below represents the energy in the chemical bonds in a pile of firewood. Replace the “X”s with the appropriate number:**
Since I can't see the figure you're referring to, I'll provide general descriptions for each point. Please adapt as necessary based on the specific energy contexts mentioned in the figure:
- **1. A pile of cold (low energy) ashes:** **Low energy** – (Assumed to have minimal chemical energy as the reaction has completed.)
- **2. A neatly stacked pile of wood:** **Moderate energy** – (The chemical potential energy is higher than ashes but not yet released.)
- **3. A roaring fire:** **High energy** – (Significant energy is released as wood burns.)
- **4. Burning kindling begins to add energy to the pile:** **Increasing energy** – (Adding energy to initiate combustion.)
- **5. A pile of hot (but cooling) coals:** **Lowering energy** – (Still high energy but gradually losing heat.)
Let me know if you need further clarifications or adjustments!