Question

Options for Part b : 1.) negative 2.)  postive or 3.) nearly zero

Consider the following gas phase reaction. D B—A=A—B + 2 D-D D CA + ť be B-B Consider the following bond energies. ASA: 600. kJ/mol ASA: 350. kJ/mol A-B: 150. kJ/mol A-D: 540. kJ/mol B-B: 380. kJ/mol D-D: 230. kJ/mol (a) What is the enthalpy of reaction? (Enter your answer to the nearest integer.) 49) kJ/mol (b) The entropy of reaction is ---Select--- 9. (c) The reaction is ---Select---

Options for Part C: 1.) Not very extensive at low temps but more so at high temps or 2.) extensive at all temps with only slight variations in temperature 3.) extensive at low temps but more so at high temps or 4.) extensive and its extent would not vary much with temperature or 5.)  extensive at low temps but less so at high temps or 6.) Not very extensive at low temps but even less so at high temps

Answer 1

tay the reaction is B-A=A-B + 2D-D - A=A & B-B the enthalpy of the reaction is given by A Hoxu - AH(B-B) + 4H (A=A) + 4 AH (D-A)- 24H (D-D) - 24H(AA) - 24H (AB) = 380 +350 +(4x540)-(2x230) - 600-(2x150) = 1530 kJ/mol (6) er the alloue reaction three molecules reals form twee products. Hence, number of molecules decreases on going from reactant to product. Here the entropy As eouls hoo.frоwd. (C) bine enthalpy is positive (endothermic reaction and entropy is negatine, here it is not extensive est love Temps but even less so at high temps.