The molar enthalpies of formation of the two polymorphs of Al 2 SiO 5 , kyanite and
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The molar enthalpies of formation of the two polymorphs of Al2SiO5, kyanite and andalusite, at standard temperature and pressure (STP), are −2593.1 and −2588.8 kJ, respectively. If one mole of kyanite were to change into one mole of andalusite at STP, would the reaction be exothermic or endothermic?
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Related Book For 
Earth Materials Introduction To Mineralogy And Petrology
ISBN: 9781107155404
2nd Edition
Authors: Cornelis Klein, Anthony Philpotts
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