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Energy changes in chemical reactions

Each beat of the human heart uses about 1 J of energy, and to raise this book (of mass close to 1.5 kg) from the floor to a tabletop about 0.97 m above the floor requires about 14 J (Fig. A.6). Because energy changes in chemical reactions tend to be of the order of thousands of joules for the amounts usually studied, it is more common in chemistry to use the kilojoule (kj, where 1 kj = 103 J). [Pg.35]

If the standard state is chosen consistently for all species, the arbitrary choice of P° will cancel out of AGrxn, AGf°[compound], and related free energy changes in chemical reactions. [Pg.181]

Refer to the "Causes of Change" chapter for a discussion of energy changes in chemical reactions. [Pg.609]

ENERGY CHANGES IN CHEMICAL REACTIONS Review Questions... [Pg.233]

Two concepts play important roles in determining the extent and speed of a chemical reaction thermodynamics, which deals with energy changes in chemical reactions, and kinetics, which describes the rate or speed of a chemical reaction. [Pg.204]

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See also in sourсe #XX -- [ Pg.145 , Pg.151 , Pg.157 , Pg.158 , Pg.159 , Pg.160 , Pg.161 , Pg.162 , Pg.163 , Pg.164 ]



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