Combustion ofurea COCNH202 is described by the equation: COCNH2)2 (s) 3/202 (g)

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Combustion ofurea COCNH202 is described by the equation: COCNH2)2 (s) 3/202 (g) CO2 (g) N2 (g) 2H20 (l) The standard enthalpy of combustion ofurea is -632 k per mole ofurea at 298 a) How much heat is either released or adsorbed per mole of oxygenconsumed b) The molar entropy ofthe combustion is 104.60 J K-1 per mole ofurea. Can you identify two distinct reasons why the combustion entropy is positive? What is the Gibbs free energy change of combustion per mole of urea at 298 K? Is it a spontaneous process? c) Calculate the standard Gibbs energy of formation per mole ofurea at 298K. The formation Gibbs free energy of CO2 --394 kj/mole and that of liquid water is -237 kJ/mole. d) Does increasing the temperature stimulate combustion? Same question ifthe pressure is increased.

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