Heats of Solution of Amino Acids in Aqueous Solution at 25° C

Enthalpy changes are given for: (1) Solution of the solid crystalline amino acid into the infinitely dilute solution https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315314440/e2f9a2bb-7701-4891-988b-084507d1705c/content/ch7_equ_0001.tif"/> ( H ¯ 2 ° − H ¯ 2 ) (2) solution of the solid crystalline substance into saturated solution https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315314440/e2f9a2bb-7701-4891-988b-084507d1705c/content/ch7_equ_0002.tif"/> ( H ¯ 2 ° ( s a t ) − H ¯ 2 ° ) and (3) dilution of the saturated solution to infinite dilution https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315314440/e2f9a2bb-7701-4891-988b-084507d1705c/content/ch7_equ_0003.tif"/> ( H ¯ 2 ° − H ¯ 2 ( s a t ) ) . All entries are Kcal mole⁻¹ and are for 25° C. Columns headed “cal” indicate direct calorimetric measurement. Columns headed “soly” indicate that the value was calculated from solubility and activity data. Generally speaking the two methods agree within the limits of error of either method.