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Easily calculate latent heat online with our Latent Heat Calculator. Find energy absorbed or released during melting, boiling, or sublimation instantly.
Our Latent Heat Calculator helps you find how much energy a substance absorbs or releases during a phase change. Whether you’re studying physics or working on a science project, this tool makes latent heat calculation quick, easy, and accurate.
When a solid melts, or a liquid boils, its temperature doesn’t change. Instead, it absorbs or releases hidden energy called latent heat. This energy is what allows ice to melt into water or steam to form from boiling water.
What is Specific Latent Heat?
Specific latent heat is the amount of energy needed to change the phase of one kilogram of a substance without changing its temperature. Think of it as the energy a substance hides or releases when changing form like when water turns into steam.
When you heat water, its temperature rises until it hits the boiling point. Then, instead of getting hotter, it starts changing into vapor. That transformation takes extra energy the latent heat of vaporization. Once all water becomes steam, any more heat raises the temperature again.
Condensation is the opposite. When vapor turns back into liquid, it releases the same amount of heat that was absorbed during vaporization.
The formula to calculate latent heat is simple:
Q = m × L
Where:
Q = Heat absorbed or released (kJ)
m = Mass of the substance (kg)
L = Specific latent heat (kJ/kg)
This formula helps you find how much energy a material needs to melt, boil, or sublimate.
For example, to melt 20 g of ice into water:
Q = 20 g × 334 kJ/kg = 6680 J
To turn the same water into vapor:
Q = 20 g × 2257 kJ/kg = 45140 J
You can see it takes much more energy to turn water into vapor than to melt ice.
Here’s how you can calculate latent heat easily:
You’ll get your answer instantly, showing the amount of energy required or released during the change.
Our calculator is designed for everyone students, engineers, and science lovers. You can choose from many substances like water, aluminum, copper, or even dry ice.
If your material isn’t on the list, select Custom, and enter your own specific latent heat value. The calculator automatically converts between different units such as kJ/kg, J/kg, cal/g, and BTU/lb, so you’ll always get the correct result.
It’s simple, accurate, and fun to use.
Latent heat appears during phase transitions melting, boiling, or sublimation. When a solid melts, the molecules break free from their fixed positions. That requires energy, but the temperature stays constant until the change is complete.
It’s like when you’re making tea. The kettle boils for a while before the water turns into steam. That extra energy doesn’t make the water hotter it helps the liquid become gas.
The Latent Heat Calculator is a smart and practical tool for quick energy calculations. Whether you’re learning physics or working in thermodynamics, this tool saves time and eliminates confusion.
By knowing the specific latent heat and mass, you can instantly compute how much energy is involved in a phase transition.
It’s a must-have tool for physics students, teachers, and engineers who want fast, accurate results.
You multiply the mass of the substance by its specific latent heat.
Formula: Q = m × L
Latent heat is the total energy absorbed or released. Specific latent heat is the energy per kilogram of the substance.
Latent heat involves a phase change, while specific heat capacity involves a temperature change.
Latent heat = 5 × 334 = 1670 kJ.
It explains how substances change states from solid to liquid to gas and helps in understanding energy balance in physics, weather, and engineering.