Enthalpy Change from a Temperature Rise Calculator
🔥 Thermochemistry & Bonding. Use the Enthalpy change from a temperature rise formula to find δh, mass of water, specific heat capacity, temperature rise, moles reacted: pick the value you want, type the others, and the answer updates as you go.
m = mass of water or solution (g), c = 4.18 J/g°C for water, n = moles that reacted. Answer in kJ/mol.
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| ΔH | kJ/mol |
| Mass of water | g |
| Specific heat capacity | J/g°C |
| Temperature rise | °C |
| Moles reacted | mol |
Worked example
Find the δh when Mass of water = 100 g, Specific heat capacity = 4.18 J/g°C, Temperature rise = 30 °C, Moles reacted = 0.01 mol.
Using Δ H = -(m c Δ T)/n: ΔH = -1254 kJ/mol.
Frequently asked questions
What is the formula for Enthalpy change from a temperature rise?
Δ H = -(m c Δ T)/n. m = mass of water or solution (g), c = 4.18 J/g°C for water, n = moles that reacted. Answer in kJ/mol.
What do the letters stand for, and what units are used?
ΔH in kJ/mol, Mass of water in g, Specific heat capacity in J/g°C, Temperature rise in °C, Moles reacted in mol.
How do you calculate δh?
Put the values into Δ H = -(m c Δ T)/n. For example, with Mass of water = 100 g, Specific heat capacity = 4.18 J/g°C, Temperature rise = 30 °C, Moles reacted = 0.01 mol, δh = -1254 kJ/mol.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (δh, mass of water, specific heat capacity, temperature rise, moles reacted) and fill in the others: it rearranges the formula for you.
