Heat of Fusion Calculator
Calculate Heat of Fusion (ΔHfus)
Select a substance and input mass to compute energy required for melting.
Result
Total Energy = — J
Energy per gram = — J/g
The Heat of Fusion Calculator is a scientifically accurate, user-friendly tool designed to compute the **latent heat of fusion (ΔHfus)** — the energy required to melt a solid into liquid without changing temperature. Built on peer-reviewed thermodynamic data from NIST and IUPAC, this calculator delivers precise results for water, metals, salts, and custom materials. Whether you're studying phase transitions, designing thermal storage, or optimizing irrigation freeze protection, this tool ensures reliability and clarity. Discover sustainable thermal solutions at Agri Care Hub.
What is Heat of Fusion?
The heat of fusion (ΔHfus) is the enthalpy change when one gram (or mole) of a substance melts at its melting point under standard pressure. It is a **latent heat** — energy absorbed or released during a phase change with no temperature change. For water, ΔHfus = 334 J/g at 0°C. This property is fundamental in thermodynamics and is extensively documented in Heat of Fusion research.
Scientific Principle: Latent Heat
The energy required to melt a mass \( m \) is given by:
Where:
- Q = heat absorbed (J)
- m = mass (g)
- ΔHfus = specific heat of fusion (J/g)
This calculator uses experimentally verified ΔHfus values measured via differential scanning calorimetry (DSC) and other standard methods.
Importance of Heat of Fusion
ΔHfus is essential in:
- Thermal Energy Storage: Phase change materials (PCMs) for solar heating
- Metallurgy: Casting, welding, and heat treatment
- Food Industry: Freezing and thawing processes
- Agriculture: Frost protection and soil thermal modeling
- Climate Science: Ice melt in glaciers and polar regions
Understanding ΔHfus supports energy-efficient farming — a focus at Agri Care Hub.
User Guidelines: How to Use
Simple steps:
- Select a substance from the dropdown
- Enter mass in grams
- For custom materials, input ΔHfus in J/g
- Click “Calculate Heat of Fusion”
- View total energy and per-gram value
Use positive mass. Results are in joules (J).
When and Why to Use This Calculator
Use it when you need to:
- Design ice-based cooling systems
- Calculate energy for metal casting
- Model frost damage in crops
- Teach phase changes in chemistry
- Optimize PCMs for greenhouses
Purpose of the Calculator
This tool makes latent heat calculations instant and error-free. It promotes scientific literacy and supports real-world applications in energy, agriculture, and materials science.
Standard ΔHfus Values (J/g)
- Water: 334
- Aluminum: 397
- Iron: 247
- Copper: 205
- Gold: 63
- Sodium Chloride: 518
- Paraffin Wax: ~200
Applications in Agriculture
Heat of fusion is key in:
- Ice formation in soil (frost heave)
- Protecting crops with water sprays (exothermic freezing)
- Thermal buffering in greenhouses
- Cold chain logistics for produce
Precision tools like this improve frost forecasting — explore more at Agri Care Hub.
Scientific Validation
Data from:
- NIST Chemistry WebBook
- CRC Handbook
- Peer-reviewed studies on Heat of Fusion
Benefits
- 100% accurate
- Instant results
- Mobile-friendly
- No login needed
- SEO-optimized
Conclusion
The Heat of Fusion Calculator is your trusted tool for phase change energy. From classroom learning to frost protection strategies, it delivers precision and insight. Start calculating today and explore thermal innovations at Agri Care Hub.