Delta H Calculator

Formula

The formula to calculate the change in enthalpy (ΔH) is:

\[ \Delta H = C_p \cdot m \cdot \Delta T \]

Where:

(\Delta H) is the change in enthalpy (Joules)
(C_p) is the heat capacity (Joules per gram per degree Celsius)
(m) is the mass (grams)
(\Delta T) is the temperature change (degrees Celsius)

What is Delta H?

Delta H, or enthalpy change, is the amount of heat released or absorbed during a chemical reaction or phase transition at constant pressure. It is an important concept in thermodynamics and chemistry, as it helps predict the energy changes and feasibility of reactions. A negative Delta H indicates an exothermic reaction (releases heat), while a positive Delta H indicates an endothermic reaction (absorbs heat).

Example Calculation

Let's assume the following values:

Heat Capacity ((C_p)) = 4.18 J/g°C
Mass ((m)) = 100 g
Temperature Change ((\Delta T)) = 25°C

Using the formula:

\[ \Delta H = C_p \cdot m \cdot \Delta T = 4.18 \cdot 100 \cdot 25 = 10450 \]

The Change in Enthalpy (ΔH) is 10450 Joules.