The enthalpy of a certain reaction is +233 kj/mol and the entropy is +110J/molk. Above what...
The reaction A + 2B → C has a change in enthalpy of 34.5 kJ/mol, and a change in entropy of 110 J/(molK). At what temperatures is the reaction spontaneous in the forward direction?
A reaction has an enthalpy change of - 71 kJ mol" and an entropy change of -58 JK-mol-. At what temperature does this exothermic reaction cease to be spontaneous? 422°C 673°c 826°C O 951°C What is the molar reaction enthalpy for the reaction below: N2H4(0) +CHNO(0) 4CHẠO(g) +Ng(g) + 3H (g) given the following thermodynamic data? 2NH3(9) ► N2H4(l) + H2(9) A,Hm = 22.5 kJ mol-1 2NH3(9) N2(g) + 3H2(9) A Hm = 57.5 kJ mol-1 CH,0(9) + H2(g) +...
1)For the process Ao → Ag) , the AHwR = 30.5 kJ/mol and ASm"-86.4 J/molK. Assuming these values are independent of T, what is the normal boiling point of substance A in °C? Do not input the unit just numerical value (the number). 2) For a certain process at 355 K, ΔG =-12.4 kJ and ΔH--72 kJ. What is the change in entropy,AS, for this process? 3)Consider the following hypothetical reaction (at 310 K). Standard free energies. AGP, in kJ/mol...
M14. For a particular reaction, the enthalpy change is AH° = +100 kJ/mol and the entropy change is AS° = + 100 J/mol K. What is the equilibrium constant at 300 K?
Thermodynamics 1) The enthalpy of vaporization of water ∆H = -25 kJ mol-1 at T = 45 °C. When water V = 15 cm3 in an open vessel evaporates at this temperature, calculate the change in entropy of the surroundings. 2) For a given reaction, ∆H = 25 kJ and ∆S = 50 J/K. Above what temperature will this reaction occur spontaneously? 3) At T = 15°C a certain protein denatures reversibly with ∆H = 30 kJ/mol. The system is...
A substance melts with an enthalpy change of 75 kJ/mol and an entropy change of 98 J/K.mol. What is its melting temperature? A) 0.77 K B) 765 K C) 1.69 K D) 425 K E) 591 K
The enthalpy of vaporization of water at 100 0°C is 40.43 kJ/mol. What is the entropy change in the surroundings when one mole of water vapor condenses at 100.0°C in a large room maintained at a temperature of 20.00°C? (answer in J/K) Answer Check
Consider a biochemical reaction under standard conditions. The change in enthalpy is -7 kJ/mol and the change in entropy is -25 JK^-1 mol^-1. Without doing any calculations, can you determine if the reaction is spontaneous? Calculate delta G^degree' for the reaction at 5 degree C. Is the reaction spontaneous or not? Why or why not? If not, does raising the temperature make the reaction more likely to be spontaneous, or less likely to be spontaneous?
The molar enthalpy of fusion of solid bismuth is 11.0 kJ mol-1, and the molar entropy of fusion is 20.2 J K-1 mol-1. (a) Calculate the Gibbs free energy change for the melting of 1.00 mol of bismuth at 575 K. kJ (b) Calculate the Gibbs free energy change for the conversion of 5.12 mol of solid bismuth to liquid bismuth at 575 K. kJ (c) Will bismuth melt spontaneously at 575 K? (d) At what temperature are solid and...
5) The reaction PC13(g) + Cl2(g) → PC15(g) has a AS of -170.2 J/molK and a AHⓇ of -87.9 kJ/mol. Assuming the values of AHⓇ and AS are constant, what is the AGⓇ value for the reaction at 120°C? A) -108.3 kJ/mol B) -21.0 kJ/mol C) -154.8 kJ/mol D) -67.5 kJ/mol 6) Which of the following observations indicates that the enthalpy change of a reaction does NOT determine if a reaction is spontaneous? A) Organic compounds can burn in the...