7. Consider the following process, in which AH® is 44.0 kJ/mol at 25°C and 40.6 kJ/mol at 100 °C H2O() → H2O(g) (a) If the entropy S® for H2O(!) and H2O(g) are 70.0 J.mol'.K' and 188.9 J.mol"'.K', respectively, calculate AS,ys and ASgsurr, each with appropriate algebraic sign at 25°C and at 100 °C. (b) Calculate ASuniv at 25°C and at 100 °C, and predict whether the evaporation of water is spontaneous at each temperature if PH20 = 1 atm.

What is the temperature at which the reaction below becomes spontaneous, if the standard entropies of reactants and products at 25oC are So (C(gr)) = 5.74 J/mol*K, So(H2(g)) = 130.68 J/mol*K, and So (C8H8(g)) = 345.2600J/mol*K and the heat of formation of C8H8(g)) is 147.8500 kJ/mol?C8H8(g) ↔ 8C(gr) + 4H2(g)a)661.88 Kb)707.958 Kc)the reaction is never spontaneousd)the reaction is always spontaneous

Consider the following reaction: C(graphite) + 1/2 O2 (g) → CO(g) Is it spontaneous under standard conditions at 298 K? Answer this question by calculating AS" (system), AS° (surroundings), and AS (universe). (Define reactants and products as the system.) S* (J/mol · K) A¡H° (kJ/mol) at 298 K (kJ/mol) Compound at 298 K C(s, graphite) 5.6 CO(g) 197.674 -110.525 CS2 (g) 237.8 116.7 CCL (e) 214.39 -128.4 Cl2 (g) 223.08 Si(s) 18.82 SİCL, (g) 330.86 -662.75 S(s, rhombic) 32.1 Br2 (e) 152.2 HBr(g) 198.70 -36.29 H2 (g) 130.7 H2O2 (e) 109.6 -187.78 O2 (g) 205.07 O yes O no

Use the data to calculate the standard entropy change for the following reaction: 5. S°[Mt(s)] 43.2 J/K mol Mt(s) + ½ O2(g) → MtO(s) S°[O2(g)] = 305.1 J/K-mol S°[MtO(s)] 62.6 J/K mol a) -133.2 J/K b) -285.7 J/K c) 285.7 J/K d) 133.2 J/K

on Item 3 Review Constants Periodic Table Part C Complete previous part(s) Part D Calculate the standard-state entropy for the following reaction: 1 CHĄ(g) +2 O2(g) → 1 CO2(g) + 2 H2O(1) (If applicable, coefficients of one have been included for clarity.) The standard entropy values are given in the table. S° Formula J/(K-mol) CO2(g) 214 H2O(1) 189 CH4(g) 186 O2(g) 205 Express your answer with the appropriate units. • View Available Hint(s)

A) for the reaction MgCo3(s) ---> MgO (s) +CO2 we can say that it is a reaction a. spontaneous b. not spontaneous c.in balance d. indeterminate B) Which substance in the following pair of compounds must have the highest standard molar entropy? C2H2 (g) or C2H6(g) a.C2H2(g) b.C2H6 c.C2H2=C2H6(g) d. undetermined

Consider the balanced reaction 4 A + 8 B → 5 C + 6 D and the absolute entropies provided in the table below. Compound S° (J/(mol·K)) A -48.8 B -89.1 C -238.5 Suppose that the ΔS° of the overall reaction is -633.7 J/(K·molrxn). Calculate the absolute entropy of D in J/(mol·K). Report your answer to three decimal places (ignore significant figures).

given rgetable of standard molar entropy values of each substance in the reaction below, what is the standard change in entropy, delta s, for the following reaction? 2CH3OH(g)+3OH2- 2CO2(g)+4H2O(g) Substance= CH3OH(g) S(J/mol•K) 240 Substance=O2(g) S(J/mol•K) 205 Substance=CO2(g) S(J/mol•K) 214 Substance=H2O(g) S(J/mol•k) 189 a. -352 J/K b. -1302 J/K c. 315 J/K d. 89 J/K E. 1830 J/K

ouming Calculate the standard molar entropy of vaporization of water at 43.0 °C, given that its standard molar entropy of vaporization at 100.0 °C is 109.0 J-K mol and the molar heat capacities at constant pressure for liquid water and water vapor are 75.3 J-K1.mol-1 and 33.6 J-K.mol, respectively, in this temperature range. J.K-1. mol-1 ASvap TOOLS x10 Question Source: Atkins 7e - Chemical Principles | Publisher: W.H. Fm We The