thermodynamics 0.0 / 5 ? ChemistrythermodynamicsUniversityNone Created by: anna888Created on: 02-02-23 12:33 what is first law of thermodynamics energy cant be created or destroyed, just moved from one form to another 1 of 21 features of exothermic reaction change that releases heat, decrease in enthalpy, delta h is negative 2 of 21 features of endothermic reaction change that requires heat, increase in enthalpy, delta h is positive 3 of 21 define enthaply a state function, which quanitifies heat flow in or out of a system at constant pressure 4 of 21 enthalpy equation delta H= delta H products- delta H reactants. KJmol 5 of 21 define a state function function where the value only depends on the present state, not on the steps taken to reach that state 6 of 21 what is hesses law. what is used to calculate the total enthalpy for a reation is equal to the sum of the enthalpy chnages for the indivudal steps. enthalpy of formation 7 of 21 define enthalpy of formation heat changes wen 1 mol of a compound is formed from its elements at 1atm. zero for uncombined elements 8 of 21 define entropy measure of randomness in a system 9 of 21 entropy equation. units? delta s = s final - s inital. JKmol 10 of 21 rank liquid gas solid as increaasing entropy solid least. gas most 11 of 21 what is the 2nd law of thermodynamics the entropy of a universe increases spontaneously and remains unchanged in equilibrium 12 of 21 what is equation that represents 2nd law of thermodynamics delta s= q (rev)/ T 13 of 21 what effect does a exothermic vs endothermic reaction have on enthalpy exo increases it, endo decreases it 14 of 21 whats the third law of thermodynamics the entropy of a perfectly ordered crystaline substance at 0K is zero 15 of 21 how to calculate equib conc conc of products/conc of reactants 16 of 21 what is delta G equib equation delta G= RTlogK 17 of 21 what does postive delta G vs negative mean positive means reaction is not sponteaneous and happens only with energy input, negative delta G means reaction is spontaneous 18 of 21 what does a K value larger than one mean reaction more to rhs, products lower in energy 19 of 21 what is equation linking enthalpy entropy and energy delta G= delta H- T delta S 20 of 21 thermodynamics vs kenetics thermodynamics is assosiated with equilbria, kenetics is assosiated with rate 21 of 21
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