when a bond is very strong, then the (1 point)
bond energy is low.
process to break it is exothermic.
process to break it is endothermic.
bond energy is high.

Question

when a bond is very strong, then the (1 point)
 bond energy is low.
 process to break it is exothermic.
 process to break it is endothermic.
 bond energy is high.

Accepted Answer

# Brief Explanations:
- **Option 1 (bond energy is low)**: Bond energy is the energy required to break a bond. A strong bond should require more energy to break, so its bond energy should be high, not low. Eliminate this.
- **Option 2 (process to break it is exothermic)**: Breaking a bond requires energy input (endothermic), while forming a bond releases energy (exothermic). So breaking a strong bond is endothermic, not exothermic. Eliminate this.
- **Option 3 (process to break it is endothermic)**: While breaking any bond is endothermic, the question is about the relationship between bond strength and bond energy (or the other options). The key here is the bond energy - a strong bond has high bond energy. This option is about the type of reaction (endothermic) which is true for bond breaking, but the more direct relationship with bond strength is bond energy. However, let's check option 4.
- **Option 4 (bond energy is high)**: Bond energy is the energy needed to break a bond. A very strong bond means it takes a lot of energy to break it, so its bond energy is high. This directly relates bond strength to bond energy. Also, breaking a strong bond (high bond energy) is endothermic (option 3), but the question's options - the most direct consequence of a strong bond is high bond energy. Wait, but let's re - evaluate:

Wait, let's correct the earlier thought. The question is "When a bond is very strong, then the...". Let's recall:

- Bond energy: The amount of energy required to break a bond. A stronger bond requires more energy to break, so bond energy is high. So option 4 is correct.

- For bond breaking: Breaking a bond always requires energy, so it's endothermic (option 3 is also correct in terms of the process type, but the question's options - let's check the options again.

Wait, the options are:

1. bond energy is low. (False)

2. process to break it is exothermic. (False, bond breaking is endothermic)

3. process to break it is endothermic. (True, because breaking a bond requires energy)

4. bond energy is high. (True, because a strong bond needs more energy to break, so bond energy is high)

Wait, now there's a confusion. But let's check the definitions again.

Bond energy: The energy required to break one mole of bonds in the gas phase. A strong bond has a high bond energy because you need more energy to break it.

Bond breaking: Any bond breaking is endothermic (ΔH positive) because energy is absorbed to break the bond.

So both option 3 and option 4 seem related. But let's check the question again. The question is "When a bond is very strong, then the...".

Let's analyze each option:

- Option 1: Wrong, as strong bond → high bond energy.

- Option 2: Wrong, bond breaking is endothermic.

- Option 3: Breaking a bond is endothermic, regardless of strength? Wait, no - the strength affects how much energy is needed (bond energy), but the process of breaking a bond is always endothermic. But the question is about the consequence of a strong bond.

- Option 4: A strong bond means it's hard to break, so the energy required (bond energy) is high. So this is a direct relationship.

Wait, but let's check standard chemistry concepts. The strength of a bond is related to its bond energy: stronger bonds have higher bond energies. So when a bond is very strong, its bond energy is high (option 4 is correct). Also, breaking a bond (any bond) is endothermic (option 3 is correct). But let's check the options again.

Wait, maybe the question is designed such that the most direct answer is option 4 (bond energy is high) and option 3 (process to break it is endothermic) is also correct? But that can't be. Wait, no - let's think again.

Wait, the process of breaking a bond: if a bond is strong (high bond energy), then breaking it requires a lot of energy, so it's endothermic (option 3). But the bond energy itself (option 4) is high because the bond is strong.

But let's check typical multiple - choice questions in chemistry. Usually, the relationship between bond strength and bond energy is that stronger bonds have higher bond energies. And bond breaking is endothermic.

But let's see the options. Let's check each:

1. bond energy is low. → False.

2. process to break it is exothermic. → False, bond breaking is endothermic.

3. process to break it is endothermic. → True, because breaking a bond requires energy.

4. bond energy is high. → True, because a strong bond needs more energy to break.

Wait, this is a problem. But maybe in the context of the question, the intended answer is option 4 (bond energy is high) and option 3 (process to break it is endothermic) is also correct? But that's not possible in a single - answer question. Wait, maybe I made a mistake.

Wait, let's check the definitions again.

Bond energy: The energy required to break a bond. So a strong bond has a high bond energy (option 4 is correct).

Bond breaking: The enthalpy change for bond breaking is positive (endothermic), so option 3 is also correct. But this is a single - choice question, so there must be one best answer.

Wait, maybe the question is from a source where the focus is on bond energy - bond strength relationship. So the most direct consequence of a strong bond is high bond energy (option 4). Because the process of breaking (endothermic) is a general property of bond breaking, while bond energy is directly related to bond strength.

So the correct answer is option 4 (bond energy is high) and option 3 (process to break it is endothermic) is also correct? But that's conflicting. Wait, no - let's check an example. A C - C single bond has a certain bond energy, a C = C double bond is stronger and has a higher bond energy. Breaking a C = C bond is endothermic, and it has a higher bond energy than C - C.

So both option 3 and option 4 are correct? But in the given options, we have to choose one. Wait, maybe the question is designed to have option 4 as the answer, because the question is about the bond's property (bond energy) when it's strong, rather than the type of reaction (endothermic) for breaking it.

So the correct answer is option 4: bond energy is high, and also option 3: process to break it is endothermic. But since it's a single - choice question, maybe there's a mistake, but according to the options, the most appropriate answer is option 4 (bond energy is high) and option 3 (process to break it is endothermic) is also correct. Wait, no - let's check a standard textbook.

From Chemistry: The Central Science, bond energy is defined as the enthalpy change required to break a bond. A stronger bond has a higher bond energy. And breaking a bond is always endothermic (ΔH > 0), while forming a bond is exothermic (ΔH < 0).

So in this question, both option 3 and option 4 are correct? But that can't be. Wait, maybe the question has a typo, or I'm misinterpreting.

Wait, let's re - read the question: "When a bond is very strong, then the..."

Options:

1. bond energy is low. → False.

2. process to break it is exothermic. → False.

3. process to break it is endothermic. → True.

4. bond energy is high. → True.

This is a problem. But maybe in the context of the question, the intended answer is option 4 (bond energy is high) because it's a more direct relationship with bond strength. Or maybe option 3.

Wait, let's think about the difference between bond energy and the enthalpy of the process.

Bond energy (E) is the energy required to break the bond. The enthalpy change for bond breaking is +E (endothermic). So a strong bond has high E (option 4), and breaking it has ΔH = +E (endothermic, option 3).

So both are correct. But since it's a multiple - choice question with one correct answer (assuming), maybe the intended answer is option 4 (bond energy is high) or option 3 (process to break it is endothermic).

Wait, maybe the question is from a source where the answer is option 4. Let's check again.

If a bond is very strong, the energy needed to break it (bond energy) is high. So option 4 is correct. Also, breaking it is endothermic (option 3 is correct). But in some textbooks, the relationship between bond strength and bond energy is emphasized, so option 4 is the more direct answer.

# Answer:
D. bond energy is high, C. process to break it is endothermic

Wait, no - the options are:

1. bond energy is low.

2. process to break it is exothermic.

3. process to break it is endothermic.

4. bond energy is high.

So the correct options are C and D? But that's not possible in a single - answer question. Wait, maybe I made a mistake. Let's check an example.

Take H - H bond (strong bond) and I - I bond (weaker bond). The bond energy of H - H is higher than I - I. Breaking H - H is endothermic (requires energy), breaking I - I is also endothermic, but H - H requires more energy (higher bond energy) because it's stronger.

So for a very strong bond:

- Bond energy is high (option 4 is correct).

- Process to break it is endothermic (option 3 is correct).

But since it's a single - choice question, maybe the intended answer is option 4 (bond energy is high) as the most direct consequence of a strong bond, while option 3 is a general property of bond breaking.

So the correct answer is D. bond energy is high.

Sovi.AI - AI Math Tutor

QUESTION IMAGE

Question

Explanation:

Answer: