Conversion of water into steam is a ________ change.

Explanation

To determine the type of change that occurs when water is converted into steam, we can follow these steps:

### Step 1: Identify the states of water
- Water exists in three states: solid (ice), liquid (water), and gas (steam). In this case, we are focusing on the conversion of liquid water to gas (steam).

### Step 2: Understand the process of heating
- When we heat water, we are adding energy to it. This energy causes the water molecules to move faster and eventually escape into the air as steam.

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