Thermodynamics- Hey that's my dollar (Amanda Hrezo)

Author

Amanda Hrezo

NGSS Science & engineering standards
- Asking Questions
- Developing Models
- Constructing explanations
NGSS Cross-cutting concept standards
- Energy and Matter
NGSS Disciplinary core idea standards
- HS-PS 1: Matter and Its Interactions
- HS-PS 3: Energy

Prior knowledge & experience:

Water can change into the gas phase

Isopropyl alcohol is more volatile than water

Root question:

Why does the dollar not ignite?

Target response:

The water and isoprpyl alcohol are mixed together and when the ethanol is burning the heat is absorbed by the water rather than the bill.

Common Misconceptions:

The coating on the dollar stops it from burning

- Fire retardants