Chemistry

Question Analysis
This question involves applying the relationship between pressure and boiling point to a real-world device. The main focus is on linking pressure changes to boiling point changes and cooking efficiency.

Key Concept Explanation
The boiling point of a liquid is directly proportional to the external pressure: higher pressure = higher boiling point, lower pressure = lower boiling point. Cooking rate increases with temperature, as most food preparation relies on temperature-dependent chemical reactions.

Step-by-Step Solution
1. Explain the pressure cooker’s effect: Increases internal pressure above 1 atm.
2. Recall the boiling condition: Vapor pressure = external pressure.
3. Connect pressure to boiling point: Higher pressure raises the boiling point of water.
4. Link higher temperature to faster cooking: Accelerates chemical reactions in food.
5. Answer: A pressure cooker increases the internal pressure above stan...