You are NOT allowed to use a calculator on the Multiple

Last updated: 4/28/2023

You are NOT allowed to use a calculator on the Multiple Choice Questions on the AP Chemistry Exam Questions 1 3 refer to the following information The removal of copper from metallic ores has been a challenge since ancient times Strong heating of copper II carbonate results in the formation of copper II oxide Although the decomposition of copper II oxide into copper metal and oxygen gas is not thermodynamically favorable under standard conditions it may be made favorable by adding carbon to the mixture The resulting reaction is 2CuO s C s 2Cu s CO2 g CuO s Cu s 1 2O g AG 128 kJ mol C s O g CO2 g AG 394 kJ mol 1 Calculate AG for the overall reaction a 138 kJ mol b 266 kJ mol c 522 kJ mol d 650 kJ mol 2 Predict and justify the sign of AS for the reaction CuO s Cu s 1 2O2 g a AS is positive because AG is positive b AS is negative because AG is positive c AS is positive because the products have more moles of gas than the reactants d AS is negative because the products have more moles of gas than the reactant 3 Which statement is correct about the value of K for the reaction 2CuO s C s 2Cu s CO2 g at standard conditions a K will be less than 1 b K will be 0 c K will be between 0 and 1 d K will be greater than 1