Question:
Freeing and Melting experiment.
1. How does the addition of salt affect the equilibrium temperature of the icewater mixture?
2. Did either cup completely freeze after 30 minutes? How does the addition of salt appear to affect the freezing point of water?
3. In order to freeze an ice cream mixture, its temperature must be brought below approximately 30C. Explain how surrounding the ice cream in a salty icewater brine helps it reach this temperature.
4. Based on what you have observed, explain why it is helpful to spread salt on icy roads and sidewalks in the winter