Heat of Hydration Calculator:
Enter the values of latent heat of evaporation, Hl(J) and specific heat, Hs(J) to determine the value of Heat of Hydration, H(J).
Heat of Hydration Formula:
The heat of hydrationrefers to the thermal energy released or absorbed when water reacts with another substance, typically a chemical compound or material, such as cement.
In cement hydration, this energy results from the exothermic chemical reactions between water and clinker components, producing hydrated compounds that harden and provide strength.
The heat of hydration is an essential factor in construction, as it influences the setting time, strength development, and durability of the material.
High heat of hydration can cause thermal stresses in massive concrete structures, potentially leading to cracking.
The process typically involves two phases of energy changes:
- Heat Released: The energy released as the material reacts with water and hydrates.
- Heat Retained: The portion of heat not dissipated to the surroundings, often retained within the system.
Heat of Hydration, H(J) in Joules is calculated by subtracting the latent heat of evaporation, Hl(J) in joules from the specific heat, Hs(J) in Joules.
Heat of Hydration, H(J) = Hs(J) – Hl(J)
H(J) = heat of hydration in Joules, J.
Hs(J) = latent heat of evaporation in Joules, J.
Hl(J) = specific heat of the hydrated compound in Joules, J.
Heat of Hydration Calculation:
1.A reaction releases a specific heat of 2000 J and has a latent heat of evaporation of 500 J. Calculate the heat of hydration.
Given: Hs(J) = 2000J, Hl(J) = 500J.
Heat of Hydration, H(J) = Hs(J) – Hl(J)
H(J) = 2000 – 500
H(J) = 1500J.
2.If a material’s heat of hydration is measured as 800 J, with a latent heat of evaporation of 200 J, find the specific heat of the hydrated material.
Given: H(J) = 800J, Hl(J) = 200J.
Heat of Hydration, H(J) = Hs(J) – Hl(J)
Hs(J) = H(J) + Hl(J)
Hs(J) = 800 + 200
Hs(J) = 1000J.