Identifying exothermic and endothermic processes in lab experiments can be tricky because of a few reasons:

1. Temperature Changes: The temperature in the room can change, making it hard to get clear results.

2. Complicated Reactions: Some chemical reactions can move heat around in ways that are hard to predict.

3. Equipment Issues: If the tools we use aren’t set up correctly, it can give us wrong readings.

To tackle these problems:

• Always use thermometers that are checked and set up correctly.
• Do the experiments in places where conditions are kept the same.
• Repeat the experiments to make sure the results are trustworthy.

Even with these challenges, careful planning and a steady approach can help us understand energy changes better.