State any two characteristics of ideal solutions.

Explanation

To answer the question regarding the characteristics of ideal solutions, we can follow these steps:

### Step-by-Step Solution:

1. **Define Ideal Solution**:
An ideal solution is a type of solution that follows Raoult's law throughout its entire concentration range. Raoult's law states that the partial vapor pressure of each volatile component in a solution is directly proportional to its mole fraction in the solution.

2. **Characteristic 1 - Enthalpy of Mixing**:
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