solution:
The standard molar entropy of H20 (1) is 70 J K-1 mol-1. The strong type of H20 is ice. In ice, atoms of H20 are less irregular than in fluid water. In this way, molar entropy of H20 (s) < molar entropy of H20 (1). The standard molar entropy of H20 (s) is under 70 J K 1 mol-1.