Why does ice have a higher melting point than solid ammonia?

Question

HIX Tutor · Accepted Answer

undefined Let's break it down step by step:

1. **What is Melting Point?**
   - Melting point is the temperature where a solid turns into a liquid.

2. **Ice vs. Ammonia:**
   - Ice is made of water (H₂O).
   - Solid ammonia is made of ammonia (NH₃).

3. **Molecule Structure:**
   - Ice has strong bonds called hydrogen bonds between water molecules.
   - Ammonia also has hydrogen bonds, but they are weaker than in ice.

4. **Strong Bonds = Higher Melting Point:**
   - Ice needs more heat to break the strong bonds.
   - That's why ice melts at 0°C (32°F), which is higher than ammonia.

5. **Ammonia Melting Point:**
   - Ammonia melts at about -77°C (-106°F).

**In summary:** Ice has a higher melting point because it has stronger bonds that need more heat to break.

HIX Tutor · Answer

undefined Okay! Let's break it down step by step:

1. **What is Ice?**  
   - Ice is frozen water.

2. **What is Ammonia?**  
   - Ammonia is a different substance. It is a gas at room temperature.

3. **Melting Point**  
   - The melting point is the temperature where a solid turns into a liquid.

4. **Hydrogen Bonds**  
   - Ice has strong hydrogen bonds. These hold water molecules tightly together.

5. **Ammonia's Bonds**  
   - Ammonia has weaker hydrogen bonds compared to ice.

6. **Why Ice Melts at a Higher Temperature**  
   - Because ice has strong bonds, it needs more heat to break those bonds and melt. 
   - Ammonia’s weak bonds require less heat to break.

7. **Conclusion**  
   - So, ice melts at a higher temperature than solid ammonia because of its stronger bonds.

I hope this helps! Let me know if you have more questions!

HIX Tutor · Answer

undefined Let’s break it down simply:

1. **What is Melting Point?**  
   It’s the temperature when a solid turns into a liquid.

2. **Ice (Water) Melting Point:**  
   Ice melts at 0°C (32°F).

3. **Solid Ammonia Melting Point:**  
   Solid ammonia melts at -77°C (-106°F).

4. **Why Ice Has a Higher Melting Point:**
   - **Molecular Structure:** Ice molecules (H2O) bond together strongly.
   - **Ammonia Structure:** Ammonia (NH3) has weaker bonds.

5. **Conclusion:**  
   Stronger bonds in ice mean it needs more heat to melt. That's why ice melts at a higher temperature than solid ammonia.

Hope that helps!

HIX Tutor · Answer

undefined Ice has a higher melting point than solid ammonia because of how the molecules are built and how they stick together.

1. **Molecule Structure**: Ice is made of water (H2O) molecules, while solid ammonia (NH3) is made of ammonia molecules.
   
2. **Hydrogen Bonds**: In ice, the water molecules make strong bonds called hydrogen bonds. This keeps them close together.

3. **Ammonia Bonds**: Solid ammonia also has hydrogen bonds, but they are weaker than in ice.

4. **Energy Needed**: To melt ice, you need more energy (heat) to break the strong bonds than you do for ammonia.

So, it takes more heat to turn ice into water than it does to turn solid ammonia into liquid. That's why ice has a higher melting point!

Noah Aldrich · Answer

Clearly because GREATER intermolecular forces of attraction operate within ice than in solid ammonia....

And we really compare apples with oranges. Water and ammonia are different materials, with different characteristic properties. Both solvents exhibit intermolecular hydrogen-bonding, which is a potent intermolecular force that elevates the boiling point. For water, #"normal boiling point"# #=100# #""^@C#, whereas for ammonia #"normal boiling point"# #=-33.3# #""^@C#. Both of these boiling points are EXCEPTIONALLY high for such small molecules... I will let you hunt down the melting points...well, one you know...