Latent Heat - English Definition & Meaning

Definition

Latent heat is the heat absorbed or released during a phase change of a substance (like melting or boiling) at a constant temperature. 🧊🔥 It's 'hidden' because it doesn't change the temperature. Instead, it breaks or forms intermolecular bonds. Think of ice melting; it absorbs heat (latent heat of fusion) but stays at 0°C until all the ice is water. Similarly, when water boils, it absorbs heat (latent heat of vaporization) but remains at 100°C until it's all steam. Latent heat explains why it takes so much energy to boil water.

Etymology

The concept of latent heat was developed by Joseph Black in the 18th century. He observed that ice required a significant amount of heat to melt without changing temperature. Black termed this 'latent heat,' meaning hidden heat. His work was crucial in understanding phase transitions and laid the groundwork for thermodynamics. It revolutionized the understanding of heat and its effects on matter.

Related Words

Examples

• "The latent heat of vaporization for water is very high."
• "During melting, the ice absorbs latent heat of fusion."
• "Steam burns are more severe because of the latent heat released during condensation."
• "Latent heat is used in refrigeration systems to transfer heat."

Encouragement

Latent heat might seem tricky, but it’s a fascinating concept that explains how matter changes state! Keep asking questions, and you'll master the hidden world of thermodynamics. 👍 You've got this!

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