2. The oxidation of glycine (C2H5NO2) to urea (CH4N2O) requires intermediates to be formed,glycylglycine (C4H8N2O3). Given information from the Table of Thermodynamic Values and the following reactions, demonstrate that the

enthalpy of reaction is a state variable for the overall conversion of glycine to urea. (20 points) 2 C_{2} H_{5} N O_{2}(s) \rightarrow C_{4} H_{8} N_{2} O_{3}(s)+H_{2} O(l) \quad \text { glycine } \rightarrow \text { glycylglycine } 30_{2}(g)+2 C_{2} H_{5} N O_{2}(s) \rightarrow C H_{4} N_{2} O(s)+3 C O_{2}(g)+3 H_{2} O(l) \text { overall conversion reaction } 30_{2}(g)+C_{4} H_{8} N_{2} O_{3}(s) \rightarrow C H_{4} N_{2} O(s)+3 C O_{2}(g)+2 H_{2} O(l) \quad \text { glycylglycine } \rightarrow \text { urea }