Created By : Rina Nayak

Reviewed By : Phani Ponnapalli

Last Updated : Apr 03, 2023

Boiling Point Calculator allows determining the boiling point of various common substances with the help of the Clausius–Clapeyron relation. You need to select the name of the substance, give initial pressure, final pressure and normal boiling point details and hit the calculate button to check the boiling point at the second stage in the result section.

State 1 (The normal boiling point):
Boiling Point
State 2:
Boiling Point

Step by Step Process to Find Boiling Point

Go through the simple and easy guidelines on how to calculate the boiling point of water and other substances.

  • Note down the normal boiling point, pressure at stage 1, stage 2 and type of the substance details.
  • Insert all these values in the Clausius–Clapeyron equation.
  • Solve the equation for stage 2 boiling point.

Boiling Point Definition

The boiling point is the temperature at which water starts boiling or the process of changing the state from liquid to gas. This boiling point is dependant on the pressure and substance latent heat of vaporization.

The boiling point elevation means the increase in solvent boiling point due to the addition of the solute. If the liquid boils to one atmospheric pressure, then the temperature is called the normal boiling point.

Clausius–Clapeyron Equation

The Clausius–Clapeyron equation is used to find the boiling point at the given pressure.

ln(P₁/P₂) = ΔH/R * (1/T₂ - 1/T₁)


P₁ is the pressure at state 1

P₂ is the pressure at state 2

T₁ is the boiling point at state 1 (at pressure equal to P₁)

T₂ is the boiling point at state 2 (at pressure equal to P₂)

ΔH is the latent heat of vaporization of the substance

R is the gas constant, equal to 8.314 J/(K * mol)


Question: What is the new boiling point prepared by adding 96 g of sodium acetate to 383 mL of water? The boiling point constant for water is 0.52°C/m.


Given that

The molarity of NaCl = (96/58.443)/0.383 = 4.28884 m

Δt = i Kb m

x = 2 (0.52) (4.28884)

= 104.46°C

Therefore, the new boiling point is 104.46°C

If you would like to learn more about the other chemistry calculator that gives instant results, stay tuned to Chemistrycalc.Com

FAQ’s on Boiling Point Calculator

1. What is the boiling point?

In chemistry, the boiling point is the temperature at which the liquid vapour pressure is equal to the external pressure around the liquid. At this stage, the liquid is converted into vapor.

2. How pressure affects boiling point?

The boiling point is reached when the liquid vapour pressure matches the atmospheric pressure. The pressure affects the boiling point of a substance. The pressure increases mean more energy is required for liquids to boil, so highest boiling point.

3. How to calculate boiling point?

The simple Clausius-Clapeyron relation formation to calculate the boiling point elevation is ln(P₁/P₂) = ΔH/R * (1/T₂ - 1/T₁). Substitute the initial pressure, final pressure and normal boiling point values in the formula and solve it to get the boiling point at stage 2.

4. Which has the lowest boiling point?

The chemical element that has the lowest boiling point is Helium. The helium boiling point value is -268.9°C.

Boiling Point Calculator