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

Question

In each he fills a reaction vessel with some mixture of the reactants and products at a constant temperature of 45.0 °C and constant total pressure Then, he measures the reaction enthalpy and reaction entropy AS of the first reaction, and the reaction enthalpy AH and reaction free energy G of the second reaction. The results of his measurements are shown in the table Complete the table. That is, calculate G for the first reaction and AS for the second. (Round your answer to zero decimal places.) 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 at equilibrium S =-2901 2A1(s) + 3H20(g) A1203 (s) + 3H2(g) Which is spontaneous? this reaction the reverse reaction O neither Fe2O3 (s) + 3H2(g) 2Fe(s) 3H20(1) Which is spontaneous? this reaction the reverse reaction O neither

Explanation / Answer

1)

deltaH = -951.0 KJ

deltaS = -2901 J/K

= -2.901 KJ/K

T= 45.0 oC

= (45.0+273) K

= 318 K

we have below equation to be used:

deltaG = deltaH - T*deltaS

deltaG = -951.0 - 318.0 * -2.901

deltaG = -28.482 KJ

Answer: deltaG = -28 KJ

Since delta G is negative, it is spontaneous in forward direction

Answer: This reaction

2)

deltaG = 0 KJ

deltaH = -33 KJ

T= 45.0 oC

= (45.0+273) K

= 318 K

we have below equation to be used:

deltaG = deltaH - T*deltaS

0.0 = -33 - 318 *deltaS

deltaS = -0.1038 KJ/K

deltaS = -104 J/K

Answer: -104 J/K

Since delta G is 0, it is spontaneous in neither direction

Answer: neither

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