Abstract
A levitation calorimetry technique was used to measure the enthalpy of liquid lanthanum from 1250 to 2420 K. Lanthanum samples ranging from 0.5 to 2 g were levitated and melted in an inert atmosphere using a 15 kV A, 450 kHz radio-frequency generator. The results, in the temperature range 1250 to 2420 K, were fitted by the following equation where the indicated errors were obtained from the average deviation of the results from the values predicted by the equation: {H(T)−H(298.15 K)} J mol −1 = (32.77±0.18)(T K)−(2289±343) Convection and radiation heat losses during the fall of the sample from the levitation chamber into the calorimeter amounted to 0.5 to 2.0 per cent and 2 to 5 per cent of the total enthalpy respectively. The levitation calorimetry method is estimated to have a maximum error of ±2.5 per cent.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
