Created By : Rina Nayak

Reviewed By : Phani Ponnapalli

Last Updated : May 10, 2023

With this Molar Heat (or Enthalpy) of Vaporization Calculator tool, it will more easy and simple to calculate the required energy that changes the given quantity of a  substance to gas at any pressure that is given. All you need to do is, provide the parameters in the required input fields and click on the calculate button. So that you will get results instantaneously.

initial temperature (T1):
final temperature (T2)::
Vapor pressure at temperature T1 (P1):
Vapor pressure at temperature T2 (P2):

### What is Molar Enthalpy Vaporization?

The amount of energy that is needed to change a substance from liquid stage to gas stage at some constant temperature and pressure is known as molar heat vaporization. And this molar heat vaporization is represented as ΔHvap. Units of this vapor pressure at temperature are pascal.

Here is the mathematical formula that is used to calculate the molar heat vaporization is,

ΔHvap= (R x ln(p2/p1 ))/((1/T1)-(1/T2))

Where,

T1 = Initial Temperature

R = Gas constant (8.31447).

p1 =Vapour pressure at an initial temperature

T2 = Final Temperature

p2 = Vapour pressure at the final temperature

### How to calculate the Molar Heat of Vaporization?

Given below is the step-by-step process that helps you to calculate the molar heat vaporization. Go through them carefully.

• Take the given values that are provided in the problem.
• Apply the molar heat of the vaporization formula.
• Then substitute the values and click on the calculate button.
• Get the result after simplifying it.

For instant results, use our chemistry calculator tools that are available at chemistrycalculatorpro.com.

### FAQs on Molar Heat of Vaporization Calculator

1. How do you calculate the molar heat vaporization?

Molar heat vaporization can be calculated by the formula, ΔHvap= (R x ln(p2/p1 ))/((1/T1)-(1/T2)).

2. How to use this molar enthalpy vaporization calculator?

To use this calculator tool, give the inputs and click on the calculate button. So that you will get results instantly.

3. How do you find molar heat?

Molar heat can be calculated by multiplying the specific heat by molar mass.

4. How do you calculate the vaporization rate?

To find the vaporization rate, you can divide the volume of liquid that is evaporated by the amount of time it takes.