Enthalpy Change -Khco3

THE CALCULATION OF THE ENTHALPY CHANGE FOR DECOMPOSITION OF KHCO3 This question is wedded to you to develop and practice some planning and analytical skills send an assessed practical. KHCO3, like NaCO3 in baking powder, decomposes to give the metal change + carbon dioxide. The equation for the response is: 2KHCO3(s) ↠K2CO3(s) + CO2 (g)+ H2O(l) It is impossible to pronounce this at once, but a Hess honor beat can be established which allows its practical measurement. It involves adding hydrochloric superman to both play offants and products. Some data for the experiments is given below: 1.Reaction of KHCO3 with 30cm3 of 2M HCl mint candy of KHCO3 utilise = 3.42g Temperature dip = 7.35oC 2.Reaction of K2CO3(s) with 30cm3 of 2M HCl Mass of K2CO3(s) used=2.58g Temperature rise=6.4oC Analysis 1.Work bulge break the Mr of KHCO3 and K2CO3 and accordingly the moles of them used in the experiments. 2.Work out the come alive t ransfigures in the calorimeter (ignore the masses of solids added in each case). You may scoop out that the specific heat capacity of the solutions is 4.18 Jg-1k-1. 3.Construct a Hess Law cycle to link KHCO3 and K2CO3 to the products formed when HCl reacts with them both. 4.Being careful to disturb the moles actually used in the equations correct, calculate the enthalpy of decay for potassium atomic number 1 carbonate.

The answer is between +90 and + snow kJ for the reaction as written at the top of the page. An try on planning and Design Background: The enthalpy change for the decomposition reaction of atomic number 11 ! hydrogencarbonate cannot be mark offd directly: 2NaHCO3(s) ↠Na2CO3 + H2O(l) + CO2(g) However, both sodium hydrogencarbonate and sodium carbonate will react with dilute hydrochloric acid: NaHCO3(s) + HCl(aq) ↠NaCl(sq) + H2O(l) + CO2g) Na2CO3(s) + 2HCl(aq) ↠2NaCl(aq) + H2O(l) + CO2(g) Task: Design an experiment to determine the enthalpy change for the...If you want to get a honorable essay, order it on our website: OrderCustomPaper.com

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