Q.

Assuming ideal behavior, the magnitude of  logK for the following reaction at 250C  is  x×101.  The value of  x  is_____. (Integer answer).
3HCCH(g)C6H6(l)
[Given :  ΔfG0(HCCH)=2.04×105Jmol1;
ΔfG0(C6H6)=1.24×105Jmol1; R=8.314  JK1mol1  ]

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answer is 855.

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Detailed Solution

3HCCH(g)C6H6(l);ΔG0=RTlnK ΔG0=Σ(ΔGf0)PΣ(ΔGf0)R RTlnK=1×(1.24×105)(3×2.04×105) 2.303×R×TlogK=4.88×105 logK=4.88×1052.303×8.314×298 =85.52=855×101x=855. 

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