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454 solutions

Gibbs Free Energy

Q. Calculate the equilibrium PCO2 at 25 degrees Celsius for reaction below. Report your answer to three significant figures. CaCO3(s) <-> CaO(s) + CO2(g) (Enter your answer in scientific notation.)

Solved • Jun 28, 2019

Gibbs Free Energy

Q. Determine the Ksp of Ag2S in water using a table of thermodynamic data. (Enter your answer in scientific notation.)

Solved • Jun 28, 2019

Gibbs Free Energy

Q. The U.S. requires automobile fuels to contain a renewable component. The fermentation of glucose from corn produces ethanol, which is added to gasoline to fulfill this requirement: C6H12O6(s) -> 2 C2H5OH(l) + 2 CO2(g) Calculate delta H^0, delta S^0, and delta G^0 for the reaction at 25 degrees Celsius. Is the spontaneity of this reaction dependent on temperature? The reaction is: a. spontaneous at all temperatures b. nonspontaneous at all temperatures c. spontaneous only at high temperatures d. spontaneous only at low temperatures e. spontaneous only in the reverse direction

Solved • Jun 28, 2019

Gibbs Free Energy

Q. A reaction that occurs in the internal combustion engine is N2(g) + O2(g) <-> 2NO(g) (a) Calculate delta H^0 and delta S^0 for the reaction at 298 K. (b) Assuming that these values area relatively independent of temperature, calculate delta G^0 at 75 degrees Celsius, 2490 degrees Celsius, and 2690 degrees Celsius.

Solved • Jun 28, 2019

Gibbs Free Energy

Q. Find delta G^0 for the following reaction, at 25 degress Celsius, using delta Hf^0 and S^0 values. Nh4Cl(s) -> NH3(g) + HCl(g)

Solved • Jun 28, 2019

Gibbs Free Energy

Q. Calculate delta G^0 for each reaction using delta Gf^0 values: (a) H2(g) + I2(s) -> 2HI(g) (b) MnO2(s) + 2CO(g) -> Mn(s) + 2CO2(g) (c) NH4Cl(s) -> NH3(g) + HCl(g)

Solved • Jun 28, 2019

Gibbs Free Energy

Q. Consider the following reaction at 25˚C: PbS(s) + 2HCl(g) → PbCl2(s) + H2S(g) ∆Gϴ= –58.4 kJ. Using the following thermodynamic data, calculate the Gibbs energy of formation, ∆G˚f, for PbCl2(s).

Solved • Jun 25, 2019