Urea, CO(NH2)2, is a naturally occurring substance which can be hydrolysed with water to form ammonia and carbon dioxide.
The standard enthalpy changes of formation of water, urea, carbon dioxide and ammonia (in aqueous solution) are given below in Table 1.1
compound | ∆Hθf / kJ mol–1 |
H2O (l) | –287.0 |
CO(NH2)2 (aq) | –320.5 |
CO2 (g) | –414.5 |
NH3 (aq) | –81.0 |
[1]
Use these data to calculate the standard enthalpy change for the hydrolysis of urea.
Calculate the enthalpy of combustion of urea, given the following equation and the data in Table 1.1.
Did this page help you?