Which term describes the heat point at which a liquid begins to boil vigorously?

Which term describes the heat point at which a liquid begins to boil vigorously?

• A. Melting point
• B. Water vapour
• C. Boiling point
• D. Flow

Answer: (C)

Boiling point is the temperature where a liquid starts to boil vigorously. At that temperature, the liquid’s vapor pressure equals the surrounding pressure, so bubbles of vapor form inside the liquid and rise to the surface. That’s why water at sea level boils near 100°C, while at higher altitudes the boiling point is lower due to lower atmospheric pressure. Melting point is the temperature at which a solid becomes a liquid, not when it boils. Water vapour refers to the gaseous form of water, not a temperature. Flow is simply how easily a liquid moves, not a temperature marker. So the heat point at which a liquid begins to boil vigorously is the boiling point.

Boiling point is the temperature where a liquid starts to boil vigorously. At that temperature, the liquid’s vapor pressure equals the surrounding pressure, so bubbles of vapor form inside the liquid and rise to the surface. That’s why water at sea level boils near 100°C, while at higher altitudes the boiling point is lower due to lower atmospheric pressure. Melting point is the temperature at which a solid becomes a liquid, not when it boils. Water vapour refers to the gaseous form of water, not a temperature. Flow is simply how easily a liquid moves, not a temperature marker. So the heat point at which a liquid begins to boil vigorously is the boiling point.