learn.howToCalculate

learn.whatIsHeading

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).

Водич корак по корак

1. 1q = m × c × ΔT
2. 2m = mass in grams
3. 3c = specific heat capacity (water: 4.18 J/g·°C)
4. 4ΔT = final temperature − initial temperature
5. 5For combustion: q = −m_fuel × ΔHcombustion / molar mass

Worked Examples