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Chemistry Question on Equilibrium

At 473 K473\,K, KcK_c for the reaction PCl5(g)<=>PCl3(g)+Cl2(g) {PCl_{5(g)}<=>PCl_{3(g)} +Cl_{2(g)}}. What will be the value of KcK_c for the formation of PCl5PCl_5 at the same temperature?

A

8.3×1038.3 \times 10^3

B

120.48120.48

C

8.3×10−38.3 \times 10^{-3}

D

240.8240.8

Answer

120.48120.48

Explanation

Solution

PCl5(g)<=>PCl3(g)+Cl2(g) {PCl_{5(g)}<=>PCl_{3(g)} +Cl_{2(g)}} ; Kc=8.3×10−3K_c =8.3 \times 10^{-3} For PCl3(g)+Cl2(g)<=>PCl5(g) {PCl_{3(g)} + Cl_{2(g)} <=> PCl_{5(g)}} ; Kc=18.3×10−3K_{c}=\frac{1}{8.3\times 10^{-3}} Kc=18.3×103K_{c}=\frac{1}{8.3}\times10^{3} =120.48=120.48