1972 Ap: Chemistry [repack] Free Response Answers

The "Net Ionic" gauntlet—students had to choose 5 out of 8 equations to write from names alone (15%).

n equals the fraction with numerator open paren 740 / 760 atm close paren cross 0.249 L and denominator 0.08206 L center dot atm/mol center dot K cross 295 K end-fraction is approximately equal to 0.0100 mol cap C cap O sub 2 open bracket 1.2 .6 close bracket cap K sub 2 cap C cap O sub 3 , there is Find Mass and Percent Mass equals 0.0100 mol cross 138.2 g/mol equals 1.38 g Percentage 1972 ap chemistry free response answers

Using the equation $\Delta G^\circ = \Delta H^\circ - T\Delta S^\circ$: $$ \Delta G^\circ = 131.3\text kJ/mol - (298\text K)(0.1341\text kJ/mol\cdot\textK) $$ $$ \Delta G^\circ = 131.3 - 39.96 $$ $$ \Delta G^\circ = +91.3\text kJ/mol $$ (The positive $\Delta G^\circ$ indicates the reaction is non-spontaneous at standard conditions.) The "Net Ionic" gauntlet—students had to choose 5