How does the Enthalpy Change (Q=mcΔT) work?

q = m × c × ΔT Then: m = mass in grams Then: c = specific heat capacity (water: 4.18 J/g·°C) Then: ΔT = final temperature − initial temperature.

Can you give an example of how to use the Enthalpy Change (Q=mcΔT)?

Example: Input 500g water heated from 20°C to 80°C gives a result of q = 500×4.18×60 = 125,400 J = 125.4 kJ (Heat absorbed by water).

Is the Enthalpy Change (Q=mcΔT) free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Enthalpy Change (Q=mcΔT)?

Our Enthalpy Change (Q=mcΔT) uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

Thực tế

Enthalpy Change (Q=mcΔT)

🔥Enthalpy Change Calculator (Q=mcΔT)

Mass m (g)

Specific heat c (J/g·°C)

Water=4.18

ΔT (°C)

Enthalpy (H) is a thermodynamic property measuring the total heat content of a system at constant pressure. Enthalpy change ΔH = q = m × c × ΔT for calorimetry calculations. Exothermic reactions release heat (ΔH < 0); endothermic absorb heat (ΔH > 0).

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Did You Know?

The standard enthalpy of combustion of octane (petrol) is −5,471 kJ/mol. One litre of petrol stores about 34,000 kJ of chemical energy — enough to heat a bathtub of water by 50°C.

References

›Enthalpy — Wikipedia
›Calorimetry — Wikipedia

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Enthalpy Change (Q=mcΔT)

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