Change In Enthalpy Calculator


In the realm of thermodynamics, understanding changes in enthalpy is crucial for various applications, ranging from chemical reactions to heat transfer processes. One essential tool in this domain is the enthalpy change calculator. In this article, we’ll delve into how to use this calculator effectively, the underlying formula, an illustrative example, frequently asked questions (FAQs), and a conclusive insight into its significance.

How to Use

To utilize the enthalpy change calculator effectively, follow these steps:

  1. Input the initial and final temperatures (in Kelvin) of the system.
  2. Enter the mass of the substance involved (in grams).
  3. Specify the specific heat capacity of the substance (in J/g°C).
  4. Click on the “Calculate” button to obtain the result.


The formula used for calculating change in enthalpy (ΔH) is:



  • ΔH = Change in enthalpy (in J)
  • m = Mass of the substance (in grams)
  • c = Specific heat capacity of the substance (in J/g°C)
  • ΔT = Change in temperature (in °C or K)

Example Solve

Let’s consider a scenario where we want to calculate the change in enthalpy for heating 50 grams of water from an initial temperature of 25°C to a final temperature of 75°C. Given that the specific heat capacity of water is 4.18 J/g°C, we can use the formula to find ΔH:

So, the change in enthalpy for heating 50 grams of water from 25°C to 75°C is 10,450 Joules.


Q: What is enthalpy?

A: Enthalpy (H) is a thermodynamic quantity that represents the total heat content of a system.

Q: How does temperature affect enthalpy?

A: Temperature directly influences the enthalpy of a substance. As temperature increases, so does the enthalpy, and vice versa.

Q: Can enthalpy change be negative?

A: Yes, a negative change in enthalpy indicates an exothermic process, where heat is released from the system.


The enthalpy change calculator serves as a valuable tool for scientists and engineers to analyze and predict changes in enthalpy across various processes. By understanding its usage, formula, and application through examples, users can gain insights into thermodynamic phenomena with precision and efficiency.

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