The product obtained in the reaction `underset(OH)underset(|)RCH-CH_(2)overset(O)overset(||)C-OHoverset(Delta)rarr`
? Is :

Answer

To solve the question regarding the product obtained in the reaction of RCH-CH2-COOH when heated, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**: The starting compound is RCH-CH2-COOH. This is a carboxylic acid with an alcohol group attached to it.

2. **Understand the Reaction Conditions**: The reaction involves heating the compound, which suggests that a dehydration reaction may occur. Dehydration typically involves the removal of a water molecule (H2O).

3. **Recognize the Functional Groups**: The presence of the -OH (alcohol) group indicates that we are likely to undergo dehydration to form an alkene.

4. **Dehydration Process**: When the compound is heated, the -OH group from the alcohol and a hydrogen atom from the adjacent carbon (CH2) will be removed as water (H2O). This results in the formation of a double bond between the two carbon atoms.

5. **Formation of the Product**: After the dehydration, the structure will change from RCH-CH2-COOH to RCH=CH-COOH. The product is now an alkene (RCH=CH) with a carboxylic acid (-COOH) group still attached.

6. **Final Product**: The final product of the reaction is RCH=CH-COOH, which is an alkene with a carboxylic acid functional group.

### Final Answer:
The product obtained in the reaction is RCH=CH-COOH.

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