you will see that including water to a textile at this type of extreme temperature might bring about an astounding explosion from the steam that's produced immediately. The basic operating principle involved in the TES system is a thermochemical reaction involving metal oxides such the calcium oxide (CaO) or magnesium oxide (MgO) and water. Figure 1 shows the temperatures recorded during this test. Calcium oxide and water Exothermic reaction. it is reaction of calcium oxide in water it is taken by profesnal in this reaction we show how much calcium is reactive However, the instructions did stipulate that the product must be spread evenly, and that the ground should be wetted prior to treatment. Calcium oxide and resealable bags. I went to a Thanksgiving dinner with over 100 guests. A layer of clean, dry straw was placed on a metal tray. Chalk is derived from limestone. - posted in Student: Why is heat produced when we add water (H2O) to calcium oxide (CaO)? Hawkins has prepared a letter for the manufacturers, which detailed these findings and suggested that manufacturers of quick lime review the advice provided with the product--highlighting the need to spread the calcium oxide evenly to reduce the risk of fire. in spite of the undeniable fact that, there are different supplies that are talked approximately as chalk which includes gypsum (CaSO4*2H2O). The workers said there had neither been recent work on, nor problems with, the fixed wiring in the building. you will see that including water to a textile at this type of extreme temperature might bring about an astounding explosion from the steam that's produced immediately. Its reaction with some other substance is endothermic or exothermic like when calcium oxide reacts with water large amount of heat is evolved. Its usage varies from about 30 to 50 kilograms (65–110 lb) per ton of steel. I conducted tests to assess if the exothermic reaction of calcium oxide and water could ignite straw. Calcium oxide is a refractory cloth meaning it stands as much as warmth very properly. One of the workers was a smoker, but he stated that he did not smoke inside the buildings. A certain lead ore contains the compound PbCO3. • The major use of quicklime is in the basic oxygen steelmaking (BOS) process. I removed the top layer of straw and saw that the straw underneath it was blackened. Though there were electric lights in the veranda, these were switched off at the time of the fire. Calcium oxide and water react in an exothermic reaction: CaO(s) + H2O(l) >>>>> Ca(OH)2(s) Heat of reaction (Rxn) = -64.8 kJ/mol How much heat would be liberated when 7.15 g CaO(s) is dropped into a beaker containing 152 g H2O. Quicklime has previously been used as a weapon of war, it is thought to have been one of the components of Greek Fire. 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