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Ch.6 - Thermochemistry
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All textbooksTro 4th EditionCh.6 - ThermochemistryProblem 84b

Chapter 6, Problem 84b

Write an equation for the formation of each compound from its elements in their standard states, and find ΔH °rxn for each in Appendix IIB. b. MgCO3(s)

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Hey everyone saying this question, I'll ask you the equation for the formation of potassium per floor right from the standard states of its elements and determine the entropy of formation. So for this we're going to have elements in their standard state. We're just gonna give us one mole of a substance. Then we have potassium in its standard state which is gonna be K solid Plus chlorine and its standard state which is gonna be cl two gas Plus oxygen in a standard state which is gonna be 02 gas and it's gonna be okay, see L. 04 solid. And we're forming one mole of potassium chlorate. So now we can balance this equation. We have potassium chlorine and oxygen on both sides. What? one potassium over here? To chlorine to auction over here. one potassium over here, one chlorine, more oxygen that we have to auction on the wrapping side. But for on the product side We can talk about two over here and put a tour in front of 02 and since we have two chlorine on the reactant side, but one on the product side we could put a one half in front of chlorine gas Because we have to keep one mole of protesting per chlorate. And so our change in entropy is going to be our standard entropy of formation. So for potassium chlorate It's gonna be negative 432 0.8. Thanks for watching my video and I hope it was helpful
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