Enter the heat capacity, mass, and temperature change into the calculator to determine the change in enthalpy (Delta H). This calculator helps in calculating the energy change during a chemical reaction or phase transition.
Delta H Formula
The following formula is used to calculate the change in enthalpy (Delta H).
ΔH = C_p * m * ΔT
Variables:
- ΔH is the change in enthalpy (Joules)
- C_p is the heat capacity (Joules per gram per degree Celsius)
- m is the mass (grams)
- ΔT is the temperature change (degrees Celsius)
To calculate Delta H, multiply the heat capacity by the mass and the temperature change.
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).
How to Calculate Delta H?
The following steps outline how to calculate the change in enthalpy (Delta H).
- First, determine the heat capacity (C_p) in Joules per gram per degree Celsius.
- Next, determine the mass (m) in grams.
- Next, determine the temperature change (ΔT) in degrees Celsius.
- Next, gather the formula from above = ΔH = C_p * m * ΔT.
- Finally, calculate the change in enthalpy (ΔH) in Joules.
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
Heat capacity (C_p) = 4.18 J/g°C
Mass (m) = 100 g
Temperature change (ΔT) = 25 °C