# Enthalpy of Water Calculator

## About Enthalpy of Water Calculator (Formula)

An “Enthalpy of Water Calculator” is a tool used to determine the enthalpy change of water (ΔH) based on its initial and final temperature. Enthalpy change is a measure of the heat energy transferred during a process, such as heating or cooling. This calculator is important in thermodynamics and engineering to analyze heat transfer and energy changes. The formula for calculating the enthalpy change of water provides insights into the energy absorbed or released by water as its temperature changes.

The formula for calculating Enthalpy Change (ΔH) of Water is:

ΔH = m × c × ΔT

Where:

• ΔH is the enthalpy change of water, typically in joules (J) or calories (cal).
• m is the mass of water being heated or cooled, typically in grams (g) or kilograms (kg).
• c is the specific heat capacity of water, which is approximately 4.186 J/g°C or 1 cal/g°C.
• ΔT is the change in temperature, typically in degrees Celsius (°C) or Kelvin (K).

This formula calculates the energy change of water based on the mass, specific heat capacity, and temperature change.

For example, if you have 500 grams of water, and the temperature increases from 20°C to 40°C, using the specific heat capacity of water (c = 4.186 J/g°C), the enthalpy change would be:

ΔH = 500 g × 4.186 J/g°C × (40°C – 20°C) = 41,860 J

This means that 41,860 joules of energy are absorbed by the water as it heats up.

The Enthalpy of Water Calculator is used in thermodynamics, chemistry, and engineering to analyze heat transfer and energy changes in water-based processes.