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When cement is allowed to set why does it give off heat?
The hydration of cement is an exothermic reaction. Three exothermic reactions are important: - hydration of gypsum and tricalciumaluminate - hydration of dicalciumsilicate - hydration of tricalciumsilicate
Heat of Hydration trend in p-block elements?
Larger the atomic size lesser the hydration energy or the energy decreases. As the atomic sizes decrease from left to right in a periodic table therefore the heat of hydration increases from left to right. Same is the case with p-block elements .
What are human health problems associated with the thinning of the ozone layer?
The health problems associated are:Skin cancerEye cataractSuppression of immune system.
Phase changes are not associated with a change in?
heat
Why hydration is always called solvation but solvation is not always called hydration?
It depends on what the solvent is. If it is water, then it is called hydration. If the solvent is not water, then it cannot be called hydration.
What is the equation of heat of hydration?
Heat of hydration or enthalpy of hydration of ions corresponds to the heat that is released by hydration of one mole of ions at a constant pressure. The more the ion is hydrated, the more heat is released. Degree of hydration depends on the size and charge of ion. The smaller the ion and the greater its charge, it will be the more hydrated.
What is the cause of heat stroke?
lack of hydration
What is the root of heat stroke?
lack of hydration
When cement is allowed to set why does it give off heat?
The hydration of cement is an exothermic reaction. Three exothermic reactions are important: - hydration of gypsum and tricalciumaluminate - hydration of dicalciumsilicate - hydration of tricalciumsilicate
What is the allowable maximum heat of hydration of concrete?
heat of hydration should not be more than66 cal/g and 75cal/g for 7&28 days respectively
Treatment for heat stroke?
Hydration and cooling the patient.
Why heat is evolved while adding water to sodium hydroxide?
This is called hydration energy (heat).
Heat of Hydration trend in p-block elements?
Larger the atomic size lesser the hydration energy or the energy decreases. As the atomic sizes decrease from left to right in a periodic table therefore the heat of hydration increases from left to right. Same is the case with p-block elements .
What are bogues compounds?
Tricalcium silicate(C3S) ALITE (gives early strength to cement....heat of hydration is 120 cal/gm) Dicalcium silicate(C2S) BELITE (gives later strength ie after 7 days...less heat of hydration) Tricalcium aluminate(C3A) CELITE (gives INITIAL strength...high heat of hydration ...320 cal/g) Tetracalcium alumino ferrite(C4AF), FELITE (very high heat of hydration) - K @ $ ! civil engineering... GITAM UNIVERSITY
What are the bogues compounds in cement?
Tricalcium silicate(C3S) ALITE (gives early strength to cement....heat of hydration is 120 cal/gm) Dicalcium silicate(C2S) BELITE (gives later strength ie after 7 days...less heat of hydration) Tricalcium aluminate(C3A) CELITE (gives INITIAL strength...high heat of hydration ...320 cal/g) Tetracalcium alumino ferrite(C4AF), FELITE (very high heat of hydration) - K @ $ ! civil engineering... GITAM UNIVERSITY
What problems are associated with modern transport?
the problems associated witn modern trasport are problems.....over..!
What are the Advantages of curing the concrete?
Advantages of curing:Gains strengthYields microcracksReleases high heat of hydration.
