Phosphorus and Chlorine Gases Combine to Produce Phosphorus Trichloride $P _ { 2 }$

question 69

Multiple Choice

Phosphorus and chlorine gases combine to produce phosphorus trichloride:
$P _ { 2 }$ (g) + $\mathrm { 3Cl } _ { 2 }$ (g) ? $2 \mathrm { PCl } _ { 3 }$ (g)
?_rG° at 298 K for this reaction is -642.9 kJ mol^-1.The value of ?_rG at 298 K for a reaction mixture that consists of $1.8 \text { atm } P _ { 2 }$ $1.2 \mathrm {~atm} \mathrm { Cl } 2$ and $0.66 \text { atm } \mathrm { PCl } _ { 3 }$ is ________ kJ mol^-1.

• A)-5.51 × 10³
• B)-90.0
• C)-71.1
• D)-4.87 × 10³
• E)-647.8

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Definitions:

Phase Current

The amount of current flowing in the phase of a three-phase load or power supply.

Line Current

The current flow in the line supplying a three-phase load.

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An electrical circuit design that uses three alternating currents, each of which reaches its peak value at one third of a cycle from the other, to efficiently supply power.