The Value of ?_fG° at 161 $P _ { 2 }$

question 37

Multiple Choice

The value of ?_fG° at 161.0 °C for the formation of phosphorus trichloride from its constituent elements, $P _ { 2 }$ (g) + $\mathrm { 3Cl } _ { 2 }$ (g) ? $2 \mathrm { PCl } _ { 3 }$ (g) is ________ kJ mol^-1.At 25.0 °C for this reaction,?_fH° is -720.5 kJ mol^-1 and $\Delta _ { \mathrm { f } } S ^ { \circ }$ is $- 263.7 \mathrm {~J} \mathrm {~K} ^ { - 1 } \mathrm {~mol} ^ { - 1 }$ .

• A)-678.0
• B)-834.9
• C)1.14 × 10⁵
• D)4.17 × 10⁴
• E)-606.1

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