Standard Free Energy

What is the standard free energy change, $\triangle$ G $^\circ$ , for the following reaction at 298 K? Is the reaction spontaneous?

2 PCl $_3$ (g) + O $_2$ (g) $\longrightarrow$ 2 POCl $_3$ , $\triangle$ H = - 620.6 kJ/mol

Values of standard molar entropy, S $_{f}^\circ$ are as follows: 2 PCl $_3$ (g), 311.8 J/K; O $_2$ (g), 205.1 J/K; POCl $_3$ , 222.4 J/K

Posted by Andrew Gomez a year ago

Related Problems

N $_2$ (g) + 3 H $_2$ (g) $\leftrightharpoons$ 2 NH $_3$ (g)

For the reaction above what is $\triangle$ H $^\circ$ given that $\triangle$ H $_f^\circ$ for NH $_3$ (g) is -45.9 kJ/mol at 25 $^\circ$ C?

N $_2$ (g) + 3 H $_2$ (g) $\leftrightharpoons$ 2 NH $_3$ (g)

For the reaction above, what is the sign and value of entropy for the reaction, given:

H $_2$ (g), S $^\circ$ (at 25 $^\circ$ C) = 130.7 J/(mol*K)

N $_2$ (g), S $^\circ$ (at 25 $^\circ$ C) = 191.56 J/(mol*K)

NH $_3$ (g), S $^\circ$ (at 25 $^\circ$ C) = 192.77 J/(mol*K)

N $_2$ (g) + 3 H $_2$ (g) $\leftrightharpoons$ 2 NH $_3$ (g)

For the reaction above, calculate the change in free energy for the reaction, if it were to go to completion.

N $_2$ (g) + 3 H $_2$ (g) $\leftrightharpoons$ 2 NH $_3$ (g)

For the reaction above, calculate the free energy of formation, $\triangle$ G $_f^\circ$ for each of the products and reactions.