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This introduction to heat and mass transfer, oriented toward engineering students, may be downloaded without charge. The ebook is fully illustrated, typeset in searchable pdf format, with internal and external links. Download A Heat Transfer Textbook. Version 5.10, 14 August 2020, 784 pp, 28 MB, 8.5×11 in. (216 x 280 mm). Official Telegram Channel (All New Updates by Admin) JOIN A CHANNEL (Only for AU Students) Anna University Group JOIN A GROUP. CIVIL Engineering Group: JOIN A GROUP. MECHANICAL Engineering Group. where eis the speciﬁc energy, ρis the density, cis the speciﬁc heat and the integral is over the volume of the system. The heat transfer can also be written in integral form as Q˙ = − Z A q′′ ·ndA+ Z V q′′′ dV (1.3) In the ﬁrst integral q′′ is the heat ﬂux vector, n is the normal outward vector at the surface.