Thermodynamics : Spontaneity of Reactions and Gibbs Free

Urea (NH2CONH2), an important nitrogen fertilizer, is produced industrially by the reaction
2 NH3(g) + CO2(g) → NH2CONH2(aq) + H2O(l)

Given that delta G^o = -13.6 kJ, calculate delta G at 25 oC for the following sets of conditions.
(a) 10 atm NH3, 10 atm CO2, 1.0 M NH2CONH2
(b) 0.1 atm NH3, 0.1 atm CO2, 1.0 M NH2CONH2
Is the reaction spontaneous for the conditions in part (a) and / or part (b)?

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