What do you understand by standard temperature and pressure?

Explanation

**Step-by-Step Solution:**

1. **Definition of Standard Temperature:**
- Standard temperature is defined as the freezing point of water, which occurs at 0 degrees Celsius. In Kelvin, this is equivalent to 273.15 K. This temperature is used as a reference point for scientific measurements and calculations.

2. **Definition of Standard Pressure:**
- Standard pressure refers to the atmospheric pressure at sea level. It is commonly defined as 1 bar, which is equivalent to 100,000 Pascals (Pa). In some contexts, a more precise value is used, which is 1.01325 x 10^5 Pa.

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