In each case, he fills a reaction vessel with some mixture of the reactants and

Question

In each case, he fills a reaction vessel with some mixture of the reactants and products at a constant temperature of 100.0 degree C and constant total pressure. Then, he measures the reaction enthalpy delta H and reaction entropy delta S of the first reaction, and the reaction enthalpy delta H and reaction free energy delta G of the second reaction. The results of his measurements are shown in the table. Complete the table. That is, calculate delta G for the first reaction and delta S for the second. (Make sure any numbers you enter have the correct number of significant digits.) Then, decide whether, under the conditions the engineer has set up, the reaction is spontaneous, the reverse reaction is spontaneous, or neither forward nor reverse reaction is spontaneous because the system is equilibrium.

Explanation / Answer

For the reaction

2NOCl -------> 2NO + Cl2

delta H = 76kJ

delta S= 115 J

T= 100C = 373 K

Thus delta G of this reaction is

delta G = delta H - T.delta S

= 76000J - 373x 115

= +33105 J

As the delta G at the given temperature is positive, the reaction is non-spontaneous in the given direction.

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.