Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Dilute, ideal-solution approximation with a nonvolatile solute. The pure-solvent boiling point must match the chosen pressure.
Example Calculation
- Solvent Kb: 0.512 K·kg/mol
- Molality: 1 mol/kg
- van ’t Hoff factor i: 2
- Pure-solvent boiling point: 100 °C
Kb=0.512, molality 1 and i=2 raise the boiling point by 1.024 K.
Method references
Frequently asked questions
How do I use this calculator?
Enter solvent kb, molality, van ’t hoff factor i, pure-solvent boiling point. The result updates automatically. Use Reset to restore the example values.
What method does it use?
ΔTb=i Kb m; Tb=Tb,pure+ΔTb.. Dilute, ideal-solution approximation with a nonvolatile solute. The pure-solvent boiling point must match the chosen pressure.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.