Classify the following as chemical or physical changes.
melting of butter in a pan

Explanation

To classify the melting of butter in a pan as a chemical or physical change, follow these steps:

### Step 1: Identify the process
- The process in question is the melting of butter when it is heated in a pan.

### Step 2: Determine the state change
- When butter melts, it changes from a solid state to a liquid state.

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