Draw a heating curve. Identify the melting and boiling points. What corresponds to these changes? Does the H temperature change during a phase change? Balance the following equation in order to answer the following questions (use the table provided in class/on the class ΔH website): Al (s) + HCl (aq) AlCl3 (s) + H2 (g) What is of this reaction? Is the reaction endothermic or exothermic? ΔH How much heat is released if 2.75 grams of AlCl3 were produced? What is of this reaction? Is the reaction an increase or decrease in entropy? ΔS What is the at 25 oC? Is this reaction spontaneous? G For the reaction at 298 K, 2A + B C , kcal and = 0.050 kcal/K. Assuming and to be constant over the H=100 S H S temperature range, at what temperature will the reaction become spontaneous? Using the data table provided in class, determine the and the for the following reaction. Is it at Ho, So G° 298 K? H2(g) + CO2 (g) H2O (g) + CO (g) ⇄ Using the data table provided in class, determine the and the for the following reaction. Is it spontaneous at Ho, So G° 298 K? N2O4(g) + CO (g) N2O (g) + CO3 (g) ⇄ Answer (IO) : 30.6 400.67 0.45 173.41 -408 4.21 214.84 -472 2000 41.2 41.9 28.71 -776 -35.8 -765
Draw a heating curve. Identify the melting and boiling points. What H corresponds to these changes? Does the temperature change during a phase change? Balance the following equation in order to answer the following questions (use the ΔH table provided in class/on the class website): Al (s) + HCl (aq) AlCl3 (s) + H2 (g) What is ΔH of this reaction? Is the reaction endothermic or exothermic? How much heat is released if 2.75 grams of AlCl3 were produced? What is ΔS of this reaction? Is the reaction an increase or decrease in entropy? What is the G at 25 oC? Is this reaction spontaneous? For the reaction at 298 K, 2A + B C , H=100 kcal and S = 0.050 kcal/K. Assuming H and S to be constant over the temperature range, at what temperature will the reaction become spontaneous? Using the data table provided in class, determine the Ho, So and the G° for the following reaction. Is it at 298 K? H2(g) + CO2 (g) ⇄ H2O (g) + CO (g) Using the data table provided in class, determine the Ho, So and the G° for the following reaction. Is it spontaneous at 298 K? N2O4(g) + CO (g) ⇄ N2O (g) + CO3 (g) Answer (IO) : 30.6 400.67 0.45 173.41 -408 4.21 214.84 -472 2000 41.2 41.9 28.71 -776 -35.8 -765