This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1878 Excerpt: ...evaporation, &c. are all varieties of ergonized heat, and are generally both internal and external. 1 Pgg. Ann. cxxv. (1865) 390. Abhandlungen uber die mechanische Warmetheorie. Appendix to 6th Memoir. 60. Entropy. The entropy of a body is its property, expressed as a measurable quantity, which remains constant when ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1878 Excerpt: ...evaporation, &c. are all varieties of ergonized heat, and are generally both internal and external. 1 Pgg. Ann. cxxv. (1865) 390. Abhandlungen uber die mechanische Warmetheorie. Appendix to 6th Memoir. 60. Entropy. The entropy of a body is its property, expressed as a measurable quantity, which remains constant when heat is neither gained nor lost by the body, and which increases or diminishes according as heat enters or leaves it: for The isentropics and adiabatics of a body are therefore coincident, as stated in 32, and their equations are f) = const. Just as we cannot determine the absolute value of the intrinsic energy of a body, since we cannot entirely deprive it of heat, so we cannot find the absolute value of its entropy: it is convenient therefore to reckon entropy from a definite state within the range of experiment. If then this state corresponds to p0, -0, /, and it is the limit from which w is measured, then equation (31) gives the entropy =irf; - As thus defined it is a relative quantity and may be negative: the absolute entropy of a body however is always positive. The best method of determining the entropy of a body--by which is meant the entropy of unit-mass--is by performing two operations: (1) altering its state without addition or removal of heat till the temperature becomes t0, the entropy remaining unchanged during this process; (2) bringing its pressure top0, the temperature being kept constantly /: if h is the heat emitted during the latter process, absorption being reckoned negative, the entropy is lowered during this process by--, and this quango tity is the relative entropy of the body in its original condition. The entropy of mass m is therefore m-; or, if in the above operation heat H is emitte...
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Seller's Description:
This is an ex-library book and may have the usual library/used-book markings inside. This book has hardback covers. In good all round condition. Cloth bound. Tightly bound. Please note the Image in this listing is a stock photo and may not match the covers of the actual item, 500grams, ISBN: