Question

The standard molar entropy of `H_(2)O (l) " is " 70 JK^(-1) mol^(-1)`. Will the standard molar entropy of `H_(2)O (s)` be more, or less than `70 JK^(-1) mol^(-1)` ?

Answer 1

The standard molar entropy of `H_(2)O(l)` is `70 JK^(-1) mol^(-1)`. The solid form of `H_(2)O` is ice. In ice, molecules of `H_(2)O` are less random than in liquid water.
Thus, molar entropy of `H_(2)O (s) lt` molar entropy of `H_(2)O(l)`. The standard molar entropy of `H_(2)O (s)` is less than `70 JK^(-1) mol^(-1)`.