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ChemBench
Heat content, accounting for expansion work.
Enthalpy adds a correction term (PΔV) to internal energy to account for work done by or on a system as it expands or contracts — at constant pressure, ΔH directly equals the heat absorbed or released.
Most chemistry happens in open containers at constant atmospheric pressure, not constant volume — enthalpy is the quantity that directly matches the heat you'd actually measure in that common setup.
Molar mass of any chemical formula (e.g. H2O, C6H12O6, Ca(OH)2).
OpenPercent composition of an element within a chemical formula.
OpenSimplest whole-number ratio formula from elemental masses or percentages.
OpenPercent yield from actual and theoretical reaction yields.
OpenEnthalpy change
41,013.25 J
What you entered
PΔV
101325 × 0.01= 1013.25 JΔH = ΔU + PΔV
40000 + 1013.25= 41013.25 JResult
Enthalpy change: 41,013.25 J
ΔH for this process is 41,013.25 J.