How to use the calorimeter heat calculator
Find heat released from the temperature change of water in a calorimeter. Enter water mass, temperature change, moles of reactant in the fields above; the heat absorbed by water, molar enthalpy are computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- m — Water mass (g)
- dT — Temperature change (°C)
- n — Moles of reactant (mol)
Worked example
With water mass = 100 g, temperature change = 6.5 °C, moles of reactant = 0.05 mol, the calculator gives heat absorbed by water ≈ 2.7196 kJ; molar enthalpy ≈ -54.392 kJ/mol.
Frequently asked questions
What is the formula for the calorimeter heat calculation?
Heat absorbed by water (kJ) = m × 4.184 × dT / 1000. Molar enthalpy (kJ/mol) = -[Heat absorbed by water] / n. Here m is water mass (g), dT is temperature change (°C), n is moles of reactant (mol).
What inputs do I need for the calorimeter heat calculator?
You need water mass in g, temperature change in °C, moles of reactant in mol. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.