What is the boiling point of water at sea level?
Show answer & explanation
Correct answer: C
Explanation
Answer: 212 °F
Explanation
The boiling point of a substance is the temperature at which its vapor pressure equals the external atmospheric pressure. At sea level, the standard atmospheric pressure is defined as 1 atm (or 101.325 kPa). Under these specific conditions:
The boiling point of water is exactly 100°C.
In the Fahrenheit scale, this corresponds to 212°F.
Key Facts for Exams
Standard Values:100°C = 212°F = 373.15 K.
Conversion Formula: To convert Celsius to Fahrenheit, use:
F = (C × 9/5) + 32
Exam-Related Practice Questions
Q: What happens to the boiling point of water as atmospheric pressure decreases?
Answer: The boiling point decreases.
Q: Why does food take longer to cook in boiling water at high altitudes (like the Himalayas)?
Answer: Because the boiling point of water is lower due to low atmospheric pressure, so the water isn't hot enough to cook the food quickly.