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The boiling point of heavy water is...

The boiling point of heavy water is

A

`100^(@)`

B

`101.4^(@)C`

C

`99^(@)C`

D

`110^(@)C`

Text Solution

AI Generated Solution

The correct Answer is:
To find the boiling point of heavy water (D2O), we can follow these steps: ### Step 1: Understand the Composition of Heavy Water Heavy water is composed of deuterium (D), which is an isotope of hydrogen. The formula for heavy water is D2O, where D represents deuterium. ### Step 2: Compare with Ordinary Water Ordinary water (H2O) is composed of protium (the most common isotope of hydrogen). The boiling point of ordinary water is 100 degrees Celsius. ### Step 3: Analyze Hydrogen Bonding In H2O, the presence of hydrogen bonding significantly contributes to its boiling point. Heavy water (D2O) has different hydrogen bonding characteristics due to the presence of deuterium instead of protium. ### Step 4: Determine the Effect of Isotope on Boiling Point The hydrogen bonding in D2O is weaker compared to H2O. As a result, the boiling point of heavy water is lower than that of ordinary water. ### Step 5: State the Boiling Point of Heavy Water The boiling point of heavy water (D2O) is approximately 101.4 degrees Celsius, which is slightly higher than the boiling point of ordinary water due to the stronger mass of deuterium. ### Conclusion Thus, the boiling point of heavy water (D2O) is approximately 101.4 degrees Celsius. ---
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