You dissolve 0.1 mol of ammonium nitrate in 100 ML of H2O.Thetemperature of the

Question

You dissolve 0.1 mol of ammonium nitrate in 100 ML of H2O.Thetemperature of the solution changes from 22C to 15C. Thespecificheat capacity for water is 4.184 J/g.K. The density forwater at22C is 0.998g/ML. A.) Is the reaction endothermic or exothermic? B.) Calculate the heat, q, released of absorbed inthedissolution reaction. C.) Calculate the enthalphy change Hrxn(kJ/mol), fordissolving1 mol of ammonium nitrate You dissolve 0.1 mol of ammonium nitrate in 100 ML of H2O.Thetemperature of the solution changes from 22C to 15C. Thespecificheat capacity for water is 4.184 J/g.K. The density forwater at22C is 0.998g/ML. A.) Is the reaction endothermic or exothermic? B.) Calculate the heat, q, released of absorbed inthedissolution reaction. C.) Calculate the enthalphy change Hrxn(kJ/mol), fordissolving1 mol of ammonium nitrate

Explanation / Answer

A) endothermic

B) heat absorbed = 4.184 x (22-15) x ( 8+ 100x0.998) = 3157.24 Joules = 3.157 KJ

C) dH rxn = + 3157.24 x 10 Joules/mole = 31572.4 Joules /mole = 31.57 KJ/mol

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