Question

6, 2017 1. In addition to identifying the reactants and products, a thermochemical reaction equation provides b. the amount of energy released or absorbed. c. the work needed to drive the reaction d. the cost of the reactantS e. the energy of the products. 2. What is the change in internal energy (AE) of a system when 4.50 x 10 J of work is done on the system while it releases 12.0 kJ of energy to the surroundings? b. -16.5 kJ c. +16.5 kJ d. +7.5 kJ e.-12.0 k 3. When solid sodium hydroxide pellets are dissolved in water, the temperature of beaker rises. The formation of an aqueous solution of sodium hydroxide is: a. an exothermic process. b. an endothermic process. c, a combustion reaction d. a thermodynamic cycle. e. a redox reaction. 4. When 0.500 mole of calcium oxide reacts with water, 32.0 kJ of heat are released. Calculate the value of ?//ona for the following equation: 2CaO(s) + 2H2O(I)-2Ca(OH)2(s) a.-32.0 k. b.-64.0 kJ c. +64.0 kJ d. +128 k e. -128 kJ 5. Calculate the work performed on/by a gas when it is compressed under a constant pressure 8.00 atm from 95.0 L to 9.5 L. (101.3 J-1 Latm) d. +69.3 kJ e. -85.5 kJ a. 102 kJ b. +85.5 kJ c. -69.3 k 6. Given equal masses of the following, which will cool the fastest from the same initial temperature? a. an aluminum pan [op 0.90 J/(g °C)] b a copper pot [op 0.39 J/(g. °C) c. an iron skillet [cp d. a container of water [op 42(g e. a container of ethanol [op 2.5J/ 0.45 J/(g·°C)] 7. The value of AHP nn for the following reaction is -289.0 kJ. 2Zn(s) + 02(g) 2ZnO(s) +2S(s) Calculate the values of AFf nm for the following equation: ZnO(s) +S(s) ? Zn(s) + ½O2(g) a. +289.0 kJ b.-578.0 kJ c. +578.0 k.J d.-144.5 kJ e. +144.5 kJ

Answer 1