CO(NH2)2(aq) + H2O Þ CO2(g) + 2 NH3(g) What is the standard enthalpy change when one mole of...

Question

Question

CO(NH₂)₂(aq) + H₂O Þ CO₂(g) + 2 NH₃(g)

What is the standard enthalpy change when one mole of urea reacts with water?
(when urea =-235.5kj/mol)

Answer 1

Answer #1

Enthalpy of formation of each compound

urea = - 235 kJ/mol

Water = -285.8 kJ/mol

CO2 = -393.5 kJ/mol

NH3 = -46 kJ/mol

Enthalpy change when one mole of urea reacts = ( -393.5 + ( -46 * 2) ) - (-235.5 - 285.8)) kJ/mol = 35.8 kJ/mol

Answer : 35.8 kJ/mol

Answer 2

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