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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 .
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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
What elements have luster and are good conductors of heat and electricity?
A metal has luster and conducts heat and electricity. Most of the elements are metals and plastic
Which elements in the periodic table are better conductors of heat?
The better conducters of heat are the metals
Do heavier metals heat up more quickly than lighter metals?
Yes. There is a property called 'specific heat capacity'. This is the amount of energy required to increase temperature of the substance by 1K. As you increase atomic weight, the heat capacity of the metal decreases. That means it requires less energy to heat up and so can heat up quicker. And this trend is not perfect, but still very pronounced. Here is a list of heat capacities of metals. If you were to rank these metals by atomic number, you would see a noticable trend.
What gives elements their properties?
heat, heat can change the state of matter therefore speeding up molecules.
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 root of heat stroke?
lack of hydration
What is the cause 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).
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 are the Advantages of curing the concrete?
Advantages of curing:Gains strengthYields microcracksReleases high heat of hydration.
Is Kaolinization process occurs due to hydrothermal alteration of feldspar?
No, It is through the process of Hydration. While hydration is an exothermic process(i.e heat is given out) hydrothermal process is endothermic.
What is the purpose of a hydration pack?
The purpose of a hydration pack is to get enough liquids into one's system in a rapid way. It usually is like a backpack of portable water that one can use for the entire day and is used during heat exposure and times hydration is required due to exertion.
