Although trimethyl amine and n-propylamine have the same molecular mass, the former boils at a lower temperature (276 K) than the latter (322 K). Why?

Explanation

To understand why trimethylamine boils at a lower temperature than n-propylamine, despite both having the same molecular mass, we need to analyze their molecular structures and the types of intermolecular forces present in each compound.

### Step-by-Step Solution:

1. **Identify the Structures**:
- **Trimethylamine (N(CH₃)₃)**: This molecule has a nitrogen atom bonded to three methyl groups (CH₃). The structure can be represented as:
```
H H H
...