Demex: At which of the following temperatures will a given mass of water occupy the greatest volume? 0°C 4°C 80°C 100°C At which of the following temperatures will a given mass of water occupy the greatest density? 0°C 4°C 80°C 100°C At which of the following temperatures will a given mass of water occupy the lowest volume? 0°C 4°C 80°C 100°C At which of the following temperatures will a given mass of water occupy the lowest density? 0°C 4°C 80°C 100°C

Here are the answers to your questions about water's volume and density at different temperatures:

• Water exhibits an anomalous expansion, meaning its density is not highest at its freezing point. Instead, it reaches its maximum density at 4°C. Consequently, it occupies its minimum volume at this temperature. As the temperature moves away from 4°C (either increasing or decreasing), water's density decreases and its volume increases.

1. At which of the following temperatures will a given mass of water occupy the greatest volume?

   • The greatest volume occurs at the temperature furthest from 4°C where expansion is most significant.
   • Answer: 100°C

2. At which of the following temperatures will a given mass of water occupy the greatest density?

   • Water has its maximum density at 4°C.
   • Answer: 4°C

3. At which of the following temperatures will a given mass of water occupy the lowest volume?

   • The lowest volume corresponds to the greatest density, which is at 4°C.
   • Answer: 4°C

4. At which of the following temperatures will a given mass of water occupy the lowest density?

   • The lowest density corresponds to the greatest volume, which occurs at the highest temperature listed.
   • Answer: 100°C