Latent Heat Formula:
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Latent heat is the heat energy absorbed or released during a phase change at constant temperature. It's called "latent" because it doesn't cause a temperature change but enables the phase transition.
The calculator uses the latent heat formula:
Where:
Explanation: The formula calculates the total energy required for a phase change based on the mass of the substance and its specific latent heat property.
Details: Accurate latent heat calculation is crucial for thermal engineering, climate science, cooking processes, and understanding energy transfer in phase changes like melting, freezing, vaporization, and condensation.
Tips: Enter mass in kilograms and specific latent heat in Joules per kilogram. Both values must be positive numbers.
Q1: What's the difference between latent heat and specific heat?
A: Latent heat is energy for phase change at constant temperature, while specific heat is energy needed to change temperature without phase change.
Q2: What are typical values for specific latent heat?
A: For water: latent heat of fusion is 334,000 J/kg, latent heat of vaporization is 2,260,000 J/kg. Values vary for different substances.
Q3: Why is latent heat important in weather systems?
A: Latent heat release during condensation drives storm systems and is a major energy source in hurricanes and thunderstorms.
Q4: How does latent heat affect cooking?
A: The latent heat of vaporization explains why boiling water maintains constant temperature and why steam can cause severe burns.
Q5: Can latent heat be negative?
A: The value is always positive, but the direction (absorption or release) depends on whether the phase change is endothermic or exothermic.