Of the following,the largest value of entropy | vedclass

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(B) Entropy is a measure of the randomness or disorder of a system. For gaseous molecules,entropy generally increases with an increase in the complexi

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$C_2H_6$

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(B) Entropy is a measure of the randomness or disorder of a system. For gaseous molecules,entropy generally increases with an increase in the complexity and size of the molecule,as there are more degrees of freedom for rotation and vibration. Comparing the given molecules: $H_2$ (diatomic,small) $CH_4$ (polyatomic,$5$ atoms) $C_2H_2$ (polyatomic,$4$ atoms) $C_2H_6$ (polyatomic,$8$ atoms) Since $C_2H_6$ has the largest number of atoms and the most complex structure among the choices,it possesses the highest degree of randomness and thus the largest entropy value. The standard molar entropy values $(J \ K^{-1} \ mol^{-1})$ at $298 \ K$ are: $C_2H_2$$200.8$$H_2$$130.58$$C_2H_6$$229.5$$CH_4$$186.2$

Of the following,the largest value of entropy at $25^{\circ} C$ and $1 \ atm$ is that of

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