Chemistry in Context: Applying Chemistry to SocietyWm. C. Brown, 1997 - 502 pagine This text is designed to encourage scientific literacy through presentations of the political, social and economic implications of chemical facts and phenomena. |
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Pagina 120
... bonds . En- ergy is required to break bonds , just as energy is required to break wood or tear paper . Bond breaking is thus an endothermic process , a term applied to any chem- ical or physical change that absorbs energy . On the other ...
... bonds . En- ergy is required to break bonds , just as energy is required to break wood or tear paper . Bond breaking is thus an endothermic process , a term applied to any chem- ical or physical change that absorbs energy . On the other ...
Pagina 121
... bond , as in the H2 molecule , is 432 kJ / mole . Similarly , the en- ergy associated with one mole of C - H bonds is 411 kJ . Bond energies for double and triple bonds are given in the bottom part of the table . Because we are doing ...
... bond , as in the H2 molecule , is 432 kJ / mole . Similarly , the en- ergy associated with one mole of C - H bonds is 411 kJ . Bond energies for double and triple bonds are given in the bottom part of the table . Because we are doing ...
Pagina 122
... bond energies . Breaking Bonds ( endothermic ) : 1 mole CH4 × 4 moles C - H bonds / mole CH4 × 411 kJ / mole 2 moles O2 × 1 mole 0 = 0 bond / mole O2 × 494 kJ / mole Total energy change ( absorbed ) || || || = 1644 kJ = 988 kJ = 2632 kJ ...
... bond energies . Breaking Bonds ( endothermic ) : 1 mole CH4 × 4 moles C - H bonds / mole CH4 × 411 kJ / mole 2 moles O2 × 1 mole 0 = 0 bond / mole O2 × 494 kJ / mole Total energy change ( absorbed ) || || || = 1644 kJ = 988 kJ = 2632 kJ ...
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