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Heat Calculator – Calculate Heat Energy (Q = mcΔT)
The Heat Calculator helps you calculate the amount of heat energy (Q) absorbed or released by a substance using the well-known physics formula Q = mcΔT. It’s perfect for students, teachers, and professionals working with thermodynamics or calorimetry.
How to Use the Heat Calculator
Enter the following values:
- Mass (m) in grams (g) or kilograms (kg)
- Specific heat capacity (c) in J/g°C or J/kg°C
- Temperature change (ΔT) in °C
The calculator instantly outputs the heat energy (Q) in joules (J).
Heat Energy Formula
Q = mcΔT
Where:
- Q = Heat energy (in joules)
- m = Mass of the substance
- c = Specific heat capacity
- ΔT = Change in temperature (Tfinal − Tinitial)
Example
Mass = 100g
Specific Heat = 4.18 J/g°C (for water)
Temperature Change = 25°C − 15°C = 10°C
Q = 100 × 4.18 × 10 = 4180 J
Common Use Cases
- Physics experiments and lab calculations
- Calorimetry in chemistry
- Thermal energy analysis in engineering
- Material science and climate research
- Heat transfer problems in school assignments
Why Use a Heat Calculator?
This calculator eliminates human error and saves time during scientific or academic work. With accurate unit handling, it makes thermal calculations simple for both beginners and experts.
Frequently Asked Questions (FAQs)
What units are supported?
Mass in grams or kg, specific heat in J/g°C or J/kg°C, ΔT in °C. The result (Q) is always in joules (J).
What is specific heat capacity?
The amount of heat required to raise 1 gram or 1 kg of a substance by 1°C.
Can I use this for cooling calculations?
Yes, a negative ΔT indicates heat loss.
What is the specific heat of water?
4.18 J/g°C (or 4180 J/kg°C) – one of the most common values used.
Can I calculate heat in calories?
This tool calculates in joules, but you can convert: 1 cal = 4.184 J.
Related tools: Calorie Calculator.