Question

1. What is AG at 25 °C (298 K) for the reaction below? Show your answer with four significant figures Cs) + 026) CO268 AH=-393.5 kJ/mol AS=0.0029 kJ/mol K 2. A certain reaction has AH = 10.3 kJ/mol and AS = 42.7J/K-mol. Calculate AG in kJ/mol at 338 K. Show your answer with four significant figures 3. Consider the following potential energy diagram that represents two different reactions. Which reaction is spontaneous? Which reaction is faster? Reaction A Reaction B 4. Which of the following statements is false? a) A catalyst increases the rate of a chemical reaction. b) A catalyst has no effect on activation energy c) A catalyst lowers the activation energy for a reaction. d) A catalyst in a body is called an enzyme. 5. The rate of a chemical reaction would be expected to increase if a) the activation energy increased b) the concentration of reactants doubled c) the activation energy were decreased d) the temperature were decreased e) b and c

Answer 1

2 an - TAS AG 298 K x 0. 00 29 KJ mot K -39 3.S KJ E-394.4 K J mot 2. As 42-7J/kmoj 10-3 KJ /mot 338KX 4 2 7 J AG Lo 3 KJ Kmot -4 133 KJ/mor product 3. Spomtanes Reaction has lower energ and become meie Reautim B Stable sfastes as reactont ond intermediate So, Smali amoun t hersae close to each ohes s regpised to achieve achivat'on emery's eners A catalyt har mo effect on achivatim 4. (6 ener b and c