Answer to Question #330288 in General Chemistry for Lwsom

Question

Write the thermochemical equation for the following reactions that occur at constant pressure:

1. One mole ammonium nitrate dissolve in water to produce aqueous ammonium ion and nitrate ions, accompanied by the absorption of 28.1 kJ of heat
2. Formation of carbon dioxide gas from carbon (graphite) and oxygen, yields 393.5 kJ of heat

Answer 1

1. NH₄NO_3(s) → NO₃^-_(aq) + NH₄⁺_(aq), ∆Н = + 28.1kJ
2. С_(s) + О_{2 (g)} → СО_{2 (g),} ∆Н = - 393.5kJ