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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
- IIT JAM
- Chemistry (CY)
6. among the following, the reaction that is accompanied by a decrease in the entropy is a) n,g) +3h,() 2nh,(g) (b) ch20,t) +60,(8) 6co,(g)+ 61,0() (c) pci(s pc
6. Among the following, the reaction that is accompanied by a decrease in the entropy is a) N,g) +3H,() 2NH,(g) (b) CH20,t) +60,(8) 6CO,(g)+ 61,0() (c) PCI(s PCI() + Cly(g) (d) 2H,0(1) 2H2g) + O2 8)
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Dinesh khalmaniya 1
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option a actually randomness increase, entropy increase. order of randomness will be gas>liquid>solid so if solid change to liquid or gas then randomness increase and hence entropy increase so in case of B,C,D entropy will increase. while in case of A there is no chance in phase but number of molecules decrease so entropy decrease
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Priyanshu kumar Best Answer
In option A the number of moles of gaseous components decreases in forward reaction...so it accompanied with decreases in entropy
More is the number of gaseous components more is degree of randomness and hence more is the entropy
hope you got this Anand...please ask if any doubt
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