For chemical reactions,the calculation of change in entropy is normally done:

In which of the following processes is $\Delta S$ positive?

One mole of ice is converted into water at $1 \ atm$ and $273 \ K$. The entropies of $H_2O_{(s)}$ and $H_2O_{(\ell)}$ are $38.2$ and $60.01 \ J \ mol^{-1} \ K^{-1}$ respectively. The enthalpy change for the conversion is ...... $J \ mol^{-1}$.

Which of the following statements is true? The entropy of the universe

$A$ container has a hydrogen and oxygen mixture in a ratio of $4 : 1$ by weight. When these gases are mixed,which of the following occurs?

Which of the following reactions will have the value of $\Delta S$ with a negative sign?