Chapter 4 Homework AssignmentQuestion 1:Classify the following phase changes by the signs of the system's ΔH and ΔS.-solid to liquid -solid to gas-liquid to solid -liquid to gas-gas to solid -gas to liquidQuestion 2:Which of the following reactions have a positive ΔSrxn? Check all that apply.2A(g) + 2B(g) → 5C(g)2A(g) + B(g) → C(g)A(g) + 2B(g) → 2C(g)A(s) + B(s) → C(g)Question 3:Calculate the standard entropy change for the following reaction at 25 °C.Question 4:Without referring to a data table, rank the following compounds by standard molar entropy.Highest S to Lowest SC₂H₄(g), N₂(g), H₂(g)Question 5:Consider the following reaction at 298 K:Calculate the following quantitiesQuestion 6:For a particular reaction, ΔH = -14.20 kJ and ΔS = -198.5 J/K. Calculate ΔG for this reaction at 298 K.What can be said about the spontaneity of the reaction at 298 K?spontaneous in the reverse directionspontaneous as writtenQuestion 7:For the reaction described by the chemical equationa) Use the data from the table to calculate the value of ΔS°rxn at 25.0 °C.b) Calculate ΔG°rxn.c) In which direction is the reaction, as written, spontaneous at 25 °C and standard pressure?Question 8:Classify the possible combinations of signs for a reaction\'s ΔH and ΔS values by the resulting spontaneity.Spontaneous as written at all temperaturesSpontaneous in reverse at all temperaturesSpontaneous as written above a certain temperatureSpontaneous as written below a certain temperatureQuestion 9:For a particular reaction, ΔH° is -28.4 kJ and ΔS is -87.9 J/K. Assuming these values change very little with temperature, over what temperature range is the reaction spontaneous in the forward direction?The reaction is spontaneous for temperatures _________ T=Question 10:The small bags of silica gel you often see in a new shoe box are placed there to control humidity. Despite its name, silica gel is a solid. It is a chemically inert, highly porous, amorphous form of SiO2. Water vapor readily adsorbs onto the surface of silica gel, so it acts as a desiccant. Despite not knowing mechanistic details of the adsorption of water onto silica gel, from the information provided, you should be able to make an educated guess about the thermodynamic characteristics of the process. Predict the signs of ΔG, ΔH, and ΔS.Question 11:Calculate the standard change in Gibbs free energy for the following reaction at 25 °C.Question 12:Under standard conditions (298 K and 1 atm), which statement is true?diamond converts to graphite spontaneouslygraphite converts to diamond spontaneouslynone of the aboveHow can the spontaneity of the reaction be reversed?increase the temperature decrease the temperature none of the aboveQuestion 13:Balance the equation and write the reaction-quotient expression, Qc.Question 14:What is the value of K for this aqueous reaction at 298 K?Question 15:At 25 °C, the equilibrium partial pressures for the following reaction were found to be PA= 2.90 atm, PB = 2.20 atm, PC = 7.10 atm, and PD = 7.60 atm.What is the standard change in Gibbs free energy of this reaction at 25 °C.Question 16:For a gaseous reaction, standard conditions are 298 K and a partial pressure of 1 atm for all species. For the reactionthe standard change in Gibbs free energy is ΔG° = -69.0 kJ/mol. What is ΔG for this reaction at 298 K when the partial pressures areQuestion 17:A critical reaction in the production of energy to do work or drive chemical reactions in biological systems is the hydrolysis of adenosine triphosphate, ATP, to adenosine diphosphate, ADP, as described byfor which ΔG°rxn = –30.5 kJ/mol at 37.0 °C and pH 7.0. Calculate the value of ΔGrxn in a biological cell in which [ATP] = 5.0 mM, [ADP] = 0.30 mM, and [HPO42–] = 5.0 mM.Is the hydrolysis of ATP spontaneous under these conditions?Question 18:The following equation represents the decomposition of a generic diatomic element in its standard state.Assume that the standard molar Gibbs energy of formation of X(g) is 5.70 kJ·mol–1 at 2000. K and –55.57 kJ·mol–1 at 3000. K. Determine the value of K (the thermodynamic equilibrium constant) at each temperature.Assuming that ΔH°rxn is independent of temperature, determine the value of ΔH°rxn from these