### Understanding the Thermodynamic Process

1. **Identify the Reaction Type**: The given reaction can be analyzed based on the signs of ΔH (enthalpy change). In this case, the reaction is written as:
$$
\text{CaCO}_3(s) + \text{CaO}(s) \rightarrow \text{CO}_2(g) \quad \Delta H = +42.5 \text{ kcal}
$$

2. **Interpret ΔH Value**: The positive sign of ΔH indicates that the system absorbs heat from the surroundings during the process, which is characteristic of endothermic reactions. In endothermic reactions, energy is required to break bonds and initiate the reaction.

3. **Conclusion**: Therefore, since the ΔH is positive, this reaction absorbs energy rather than releases it.

### Final Answer
The process is **endothermic**.

Question

### Understanding the Thermodynamic Process

1. **Identify the Reaction Type**: The given reaction can be analyzed based on the signs of ΔH (enthalpy change). In this case, the reaction is written as:
   $$
   \text{CaCO}_3(s) + \text{CaO}(s) \rightarrow \text{CO}_2(g) \quad \Delta H = +42.5 \text{ kcal}
   $$

2. **Interpret ΔH Value**: The positive sign of ΔH indicates that the system absorbs heat from the surroundings during the process, which is characteristic of endothermic reactions. In endothermic reactions, energy is required to break bonds and initiate the reaction.

3. **Conclusion**: Therefore, since the ΔH is positive, this reaction absorbs energy rather than releases it.

### Final Answer
The process is **endothermic**.

Knowee AI · Accepted Answer

### Understanding the Thermodynamic Process

1. **Identify the Reaction Type**: The given reaction can be analyzed based on the signs of ΔH (enthalpy change). In this case, the reaction is written as:
   $$
   \text{CaCO}_3(s) + \text{CaO}(s) \rightarrow \text{CO}_2(g) \quad \Delta H = +42.5 \text{ kcal}
   $$

2. **Interpret ΔH Value**: The positive sign of ΔH indicates that the system absorbs heat from the surroundings during the process, which is characteristic of endothermic reactions. In endothermic reactions, energy is required to break bonds and initiate the reaction.

3. **Conclusion**: Therefore, since the ΔH is positive, this reaction absorbs energy rather than releases it.

### Final Answer
The process is **endothermic**.

Is the following process exothermic or endothermic? Select the single best answer.→CaCO3s + CaOs CO2g =ΔH+42.5kcal

Question

Solution

Understanding the Thermodynamic Process

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