Abstract
A procedure is proposed to calculate the heat of coal metamorphism. It is shown that the process of coalification in the Earth's bowels is endothermic.
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Bychev, R.M., Petrova, G.I. & Bychev, M.I. Thermodynamic Conditions of Coalification. Journal of Mining Science 40, 210–215 (2004). https://doi.org/10.1023/B:JOMI.0000047866.24451.28
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DOI: https://doi.org/10.1023/B:JOMI.0000047866.24451.28