Absolute zero corresponds to

Options

A. `-273` K
B. `273^@` C
C. `273^@R`
D. none of these

Answer

To solve the question "Absolute zero corresponds to", we need to understand what absolute zero is and how it is represented in different temperature scales. Here’s a step-by-step solution:

### Step 1: Define Absolute Zero
Absolute zero is the theoretical temperature at which a system's entropy and enthalpy reach their minimum values. At this temperature, the particles of a substance have minimal vibrational motion, indicating that the system has very little thermal energy.

**Hint:** Remember that absolute zero is a theoretical limit and represents a state of minimum energy.

### Step 2: Identify the Temperature Scale
Absolute zero is defined as 0 Kelvin (K). The Kelvin scale is an absolute temperature scale used in the physical sciences.

**Hint:** The Kelvin scale starts at absolute zero, which is 0 K.

### Step 3: Convert Absolute Zero to Celsius
To convert from Kelvin to Celsius, we use the formula:
\[ \text{Temperature in Celsius} = \text{Temperature in Kelvin} - 273.15 \]
Thus, absolute zero in Celsius is:
\[ 0 \, K - 273.15 = -273.15 \, °C \]

**Hint:** Remember the conversion formula between Kelvin and Celsius.

### Step 4: Analyze the Options
Now, let's analyze the options provided in the question:
1. **Minus 273 K** - This is incorrect because absolute zero is 0 K, not -273 K.
2. **Minus 273 °C** - This is correct because absolute zero corresponds to -273.15 °C.
3. **R (Rankine)** - This is not relevant to the question.
4. **None of these** - This option is not correct since we have identified -273 °C as a valid representation.

**Hint:** Carefully check each option against your understanding of absolute zero.

### Step 5: Conclusion
Based on the analysis, the correct answer to the question "Absolute zero corresponds to" is **-273 °C**. However, since this option is not explicitly listed, the answer would be **None of these**.

**Final Answer:** None of these.