CHM135H1 Lecture 27: 16/11/16 CHM135H1 F LEC0101 Lecture 27 Notes
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Chm135h1 f - lecture 27 - chapter 9 (4) Example 1: calculate the standard enthalpy of reaction for photosynthesis of glucose and o2 from co2 and liquid h2o. H = h f c6h12o6. Sometimes, there is enthalpy change due to mixing reactants/ products. If rxnh > 0, then heat flows in to system during reaction - endothermic rxnh < 0, then heat flows out of system during reaction - exothermic. Since energy and enthalpy is calculated as differences between initial and final states, we can set standards for conditions. [c] = 1 m for solutions at p . Form: most stable phase at p and t . Can decompose reactants and products into atoms instead of elements. H = h reactants h products rxn where h b. = heat energy required to break all chemical bonds. Can interpret rxnh as difference in heat energy necessary to break bonds in reactants and products - this is the concept of stability.
