化学选修四考试（Chemistry takes four exams）.docVIP

化学选修四考试（Chemistry takes four exams） Senior chemistry elective 4 examination questions Chemistry (Science) examination questions Explanation: the test paper is divided into Volume 1 (choice question) and Volume II (non choice question) Exam time: 90 minutes, 100 points Possible relative atomic mass: H., 1, C., 12, N., 14, O., 16, F., 19, Na., 23, P., 31, S., 32, Cl., 35.5, Ca., 40, Mn., 55, Cu.,, Fe., 56, 64,... Volume 1 (36 points) A choice (1-6, every day there is only one right answer, every day 2 7-12 every day, only one or two correct answers, every day 4 points, a total of 36 points) 1, the following statement is incorrect A. for the reaction of 2A (s), +B (g), =2C (g), H = - 221, kJ, mol-1, the total energy of the reactants in the reaction must be greater than the total energy of the product The reaction heat of B. chemical reaction is not only related to the initial state and final state of reaction system, but also to the reaction route C. chemical reactions that require heating are not necessarily endothermic reactions D. H of the chemical reaction is related to the amount of substance involved in the reaction 2. The following is true about thermochemical equations A., 2H2 (g), +O2 (g), =2H2O (L), Delta H=-571.6kJ/mol B., 2SO2+O2=2SO3, Delta H=-196.6kJ/mol C.H2 (g), +1/2O2 (g), =H2O (L), Delta H=-285.8kJ D.C (s), +O2 (g), =CO2 (g), Delta H=+393.5kJ/mol 3, the following is about the rate of chemical reaction, the correct is () A. known N2 + 3H2 2NH3: V (N2): V (H2): V (NH3) = 1: 2: 3 The rate of B. chemical reaction is 0.5mol/ (L, s), which means that the concentration of a substance is 0.5mol/L in 1 seconds C. according to the magnitude of the chemical reaction rate, we can know the speed of the chemical reaction D. for any chemical reaction, the faster the reaction rate, the more obvious the reaction 4, the following statement is correct A. all exothermic reactions are spontaneous, because endothermic reactions are non spontaneous The spontaneous reaction