41. This amplification takes place in only an hour, under isothermal conditions between 60-65 �C. 42. In an isothermal compression process, the gas in the system is kept at a constant temperature throughout. 43. For the isothermal -barotropic model, density and pressure turn out to be exponential functions of altitude. 44. An example of Calvet-type calorimeter is the C80 Calorimeter ( reaction, isothermal and scanning calorimeter ). 45. Isopycnic surfaces contrast with isobaric or isothermal surfaces, which describe surfaces of constant pressure and constant temperature respectively. 46. This equation can be used to obtain Joule-Thomson coefficients from the more easily measured isothermal Joule Thomson coefficient. 47. When one obtains perfect isothermal storage ( and discharge ), the process is said to be " reversible ". 48. Also, with proper accessories, some IMC instruments can be operated as ITC ( isothermal titration calorimetry ) instruments. 49. It facilitates the direct measurement of the heat capacity in one measurement, even in ( quasi-) isothermal conditions. 50. Thus, Gibbs free energy is most useful for thermochemical processes at constant temperature and pressure : both isothermal and isobaric.
