89. Consider this reaction occurring at 298 K: N2O(g) + NO2(g) 3 NO(g) a. Show that the reaction is not spontaneous under standard conditions by calculating A Grxn b. If a reaction mixture contains only N2O and NO2 at partial pressures of 1.0 atm each, the reaction will be spontane- ous until some NO forms in the mixture. What maximum partial pressure of NO builds up before the reaction ceases to be spontaneous? c. Can the reaction be made more spontaneous by an increase or decrease in temperature? If so, what temperature is required to make the reaction spontaneous under standard conditions?

13)The reaction 2NOBr(g) → 2NO(g) + Br₂(g) has AG° = 6.28 kJ. a. Calculate Q when [NOBr] = 0.15 M, [NO] = 0.096 M, and [Br₂] = 0.081 M. b. Calculate AG for the reaction at 150°C. c. Is this reaction spontaneous or non-spontaneous under these conditions? Scanned with CamScanner

H₂(g) + I₂(g) ⇒2HI(g) AG for the reaction is 2.60 kJ/mol at 25°C. What is the minimum partial pressure of I2 required for the reaction to be spontaneous in the forward direction at 25°C if the partial pressures of H₂ and HI are 8.5 and 4.25 atm, respectively? atm

In a biochemical reaction, A + B ® C with DG= 30 kJ/mol. Which of the following reactions, if any, might be effectively coupled to this reaction so that it becomes more spontaneous?  I. C + D -> B + E  Delta G = –40 kJ/mol II. C + D -> B + E  Delta G = +40 kJ/mol

A chemist fills a reaction vessel with 2.90 atm nitrogen monoxide (NO) gas, 6.95 atm chlorine (Cl,) gas, and 7.94 atm nitrosyl chloride (NOCI) gas at a temperature of 25.0°C. Under these conditions, calculate the reaction free energy AG for the following chemical reaction: 2NO (g) + Cl, (g) 2NOC1 (g) Use the thermodynamic information in the ALEKS Data tab. Round your answer to the nearest kilojoule.

A reaction has a positive ΔH and a postiive ΔS. When is the reaction spontaneous (if ever)?   ΔG = ΔH - TΔS     High temperature     Low temperature     Always     Never

For each reaction, calculate ΔH°rxn, ΔS°rxn, and ΔG°rxn at 25 °C and state whether or not the reaction is spontaneous. If the reaction is not spontaneous, would a change in temperature make it spontaneous? If so, should the temperature be raised or lowered from 25 °C?a. 2 CH4( g)------->C2H6( g) + H2( g)b. 2 NH3( g)------> N2H4( g) + H2( g)c. N2( g) + O2( g)-------->2 NO( g)d. 2 KClO3(s)-------->2 KCl(s) + 3 O2( g)

At constant pressure, the reaction 2A(g) → B(g) is exothermic. Which of the following statements is true for this reaction? Select one: The reaction is never spontaneous at any temperature. The reaction is spontaneous at high temperatures. It is not possible to determine the spontaneity without more information. The reaction is spontaneous at all temperatures. The reaction is spontaneous at low temperatures.

5. Calculate ΔG° and ΔG750°C for the following reaction 2NO (g) + O2 (g) ⇌ 2NO2(g) which is important in the formation of urban smog. Assume that ΔH and ΔS do not change between 25.0°C and 750°C and use these data: S°(NO) = 210.8 J/(mol•K), S°(O2) = 205.2 J/(mol•K), S°(NO2) = 240.1 J/(mol•K), ΔH∘f(NO2) = 33.2 kJ/mol, and ΔH∘f (NO) = 91.3 kJ/mol.