Water has maximum density at

Options

A. 273K
B. 373K
C. 277K
D. 369K

Answer

To solve the question "Water has maximum density at," we can follow these steps:

### Step 1: Understand the Concept of Density
Density is defined as the mass of a substance divided by its volume. The formula for density (ρ) is given by:
\[ \rho = \frac{m}{V} \]
where \(m\) is the mass and \(V\) is the volume.

### Step 2: Investigate the Behavior of Water
Water exhibits unique properties as it cools and warms. Specifically, as water cools from room temperature, its density increases until it reaches a certain temperature.

### Step 3: Identify the Temperature of Maximum Density
Through empirical studies, it has been observed that water reaches its maximum density at approximately 4 degrees Celsius. At this temperature, the volume of a given mass of water is at its minimum, leading to maximum density.

### Step 4: Convert the Temperature to Kelvin
To express the temperature in Kelvin, we can use the conversion formula:
\[ T(K) = T(°C) + 273 \]
Substituting the temperature:
\[ T(K) = 4 + 273 = 277 \text{ K} \]

### Step 5: Conclusion
Thus, the maximum density of water occurs at 4 degrees Celsius or 277 Kelvin.

### Final Answer:
Water has maximum density at **4 degrees Celsius** (or **277 Kelvin**).

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