Answer :
Water begins to boil at 100 degrees Celsius under standard atmospheric pressure (1 atmosphere or 101.3 kPa). Here are the steps to understand why:
1. Standard Boiling Point: The boiling point of a substance is the temperature at which it changes from a liquid to a gas. For water, this standard boiling point is 100 degrees Celsius at sea level.
2. Explanation of Options:
- 0 degrees Celsius: This is the freezing point of water, not its boiling point.
- 32 degrees Celsius: This is approximately the freezing point in degrees Fahrenheit, not a boiling point.
- 100 degrees Celsius: This is the correct boiling point of water under standard conditions.
- 212 degrees Fahrenheit: This is the boiling point of water in Fahrenheit, not Celsius.
Therefore, the correct option for the temperature at which water begins to boil is 100 degrees Celsius.
1. Standard Boiling Point: The boiling point of a substance is the temperature at which it changes from a liquid to a gas. For water, this standard boiling point is 100 degrees Celsius at sea level.
2. Explanation of Options:
- 0 degrees Celsius: This is the freezing point of water, not its boiling point.
- 32 degrees Celsius: This is approximately the freezing point in degrees Fahrenheit, not a boiling point.
- 100 degrees Celsius: This is the correct boiling point of water under standard conditions.
- 212 degrees Fahrenheit: This is the boiling point of water in Fahrenheit, not Celsius.
Therefore, the correct option for the temperature at which water begins to boil is 100 degrees Celsius.
