Given two processes: `(1)/(2)P_(4)(s) +3CI_(2)(g) rarr 2PCI_(3)(l), DeltaH =- 635 kJ` `PCI_(3) (l) +CI_(2)(g) rarrPCI_(5)(s), DeltaH =- 137 kJ` The va

Question

Given two processes: `(1)/(2)P_(4)(s) +3CI_(2)(g) rarr 2PCI_(3)(l), DeltaH =- 635 kJ` `PCI_(3) (l) +CI_(2)(g) rarrPCI_(5)(s), DeltaH =- 137 kJ` The va

Given two processes:
`(1)/(2)P_(4)(s) +3CI_(2)(g) rarr 2PCI_(3)(l), DeltaH =- 635 kJ`
`PCI_(3) (l) +CI_(2)(g) rarrPCI_(5)(s), DeltaH =- 137 kJ` The value of `DeltaH^(Theta)` of `PCI_(5)` is
A. `454.5kJ" "mol^(-1)`
B. `-454.5kJ`
C. `-772kJ" "mol^(-1)`
D. `-498kJ" "mol^(-1)`

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - B
`(1)/(4)P_(4)(s)+(3)/(2)Cl_(2)(g)toPCl_(5)(l),DeltaH=-(635)/(2)kJ`
`PCl_(3)(l)+Cl_(g)toPCl_(5)(s),DeltaH=-137kJ`
On adding, `overline((1)/(4)P_(4)(s)+(5)/(2)Cl_(2)(g)toPCl_(5)(s),DeltaH=-137kJ)`

4 views Answered 2023-02-05 15:29