Temperature changes within samples in heat conduction calorimeters
(2000) In Thermochimica Acta 366(2). p.121-127- Abstract
- So-called isothermal calorimeters are often built on the heat conduction principle. This may sound as a contradiction, as heat conduction is a result of non-isothermal conditions, but most measurements with microcalorimeters and other such instruments are essentially isothermal as the temperature differences within the instruments are in the order of 10 mK. This paper presents simple methods to estimate the temperature changes within a sample in a heat conduction calorimeter during a measurement. It also shows that the determination of activation energy is normally not disturbed by these small temperature changes. In addition to the heat production rate in the sample, the thermal properties of the sample and the calorimeter are needed as... (More)
- So-called isothermal calorimeters are often built on the heat conduction principle. This may sound as a contradiction, as heat conduction is a result of non-isothermal conditions, but most measurements with microcalorimeters and other such instruments are essentially isothermal as the temperature differences within the instruments are in the order of 10 mK. This paper presents simple methods to estimate the temperature changes within a sample in a heat conduction calorimeter during a measurement. It also shows that the determination of activation energy is normally not disturbed by these small temperature changes. In addition to the heat production rate in the sample, the thermal properties of the sample and the calorimeter are needed as input to the calculations. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1034506
- author
- Wadsö, Lars LU
- organization
- publishing date
- 2000
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Thermochimica Acta
- volume
- 366
- issue
- 2
- pages
- 121 - 127
- publisher
- Elsevier
- external identifiers
-
- scopus:0035941561
- ISSN
- 0040-6031
- DOI
- 10.1016/S0040-6031(00)00738-3
- language
- English
- LU publication?
- yes
- id
- fae47f60-e370-4daa-bc9b-259f4ba01263 (old id 1034506)
- date added to LUP
- 2016-04-01 16:41:18
- date last changed
- 2022-01-28 21:23:14
@article{fae47f60-e370-4daa-bc9b-259f4ba01263,
abstract = {{So-called isothermal calorimeters are often built on the heat conduction principle. This may sound as a contradiction, as heat conduction is a result of non-isothermal conditions, but most measurements with microcalorimeters and other such instruments are essentially isothermal as the temperature differences within the instruments are in the order of 10 mK. This paper presents simple methods to estimate the temperature changes within a sample in a heat conduction calorimeter during a measurement. It also shows that the determination of activation energy is normally not disturbed by these small temperature changes. In addition to the heat production rate in the sample, the thermal properties of the sample and the calorimeter are needed as input to the calculations.}},
author = {{Wadsö, Lars}},
issn = {{0040-6031}},
language = {{eng}},
number = {{2}},
pages = {{121--127}},
publisher = {{Elsevier}},
series = {{Thermochimica Acta}},
title = {{Temperature changes within samples in heat conduction calorimeters}},
url = {{http://dx.doi.org/10.1016/S0040-6031(00)00738-3}},
doi = {{10.1016/S0040-6031(00)00738-3}},
volume = {{366}},
year = {{2000}},
}