Using Kirchhoffs law

The enzyme glutamine synthetase mediates the synthesis of the amino acid glutamine (Gin, 8) from the amino acid glutamate (Glu, 7) and ammonium ion  

The process is endothermic and requires energy extracted from the oxidation of biological fuels and stored in ATP Case study 1.1). Estimate the value of the reaction enthalpy at 60°G by using data found in this text (see the Resource section) and the following additional information a )) = 187.0 J K mol  

Strategy Galculate the value of A Cp from the available data and eqn 1.25 and use the result in eqn 1.24. 

Solution From the Resource section, the standard molar constant- pressure heat capacities of Tl20(l) and NHl(aq) are 75.3 J K moF and 79.9 J K mol, respectively. It follows that 

An exothermic process releases energy as heat, q, to the surrormdings an endothermic process absorbs energy as heat. 

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