At which of the following temperatures would one liter of water weigh the most?
A) 2°C
B) 4°C
C) 8°C
D) 90°C
E) It would weigh the same at all these temperatures.

Question

Quizplus · Accepted Answer

One liter of water weighs the most at 4°C. This is because water has its maximum density at this temperature. At temperatures above or below 4°C, the water molecules begin to move more rapidly or slow down, causing them to push apart or become more tightly packed, respectively. Therefore, the density and weight of the water would decrease at temperatures other than 4°C.

At Which of the Following Temperatures Would One Liter of Water