Why does the entropy of a substance increase with an increase in temperature?

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(N/A) As the temperature increases,the kinetic energy of the molecules increases,which leads to an increase in the translational,rotational,and vibrational motions of the particles. This results in greater disorder in the system,and therefore,the entropy increases.

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In which of the following processes does entropy decrease?

The entropy values (in $J K^{-1} mol^{-1}$) of $H_{2(g)} = 130.6$,$Cl_{2(g)} = 223.0$ and $HCl_{(g)} = 186.7$ at $298 \ K$ and $1 \ atm$ pressure. Then entropy change for the reaction $H_{2(g)} + Cl_{2(g)} \to 2HCl_{(g)}$ is :-

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