What is the temperature at STP?

The standard temperature at standard temperature and pressure (STP) is defined as 0 degrees Celsius or 273.15 Kelvin. This temperature is universally used in scientific contexts to standardize the conditions under which gas laws are applied, making it easier to compare experimental results or calculations.

Standard pressure, which accompanies this temperature at STP, is defined as 1 atmosphere (atm) or 101.3 kPa. This helps in the determination of the behavior of gases under these conditions, adhering to the ideal gas law and allowing for accurate predictions of gas behavior in various scenarios. Thus, the correct answer reflects the commonly accepted value for temperature at STP, which is crucial for understanding gas laws in chemistry.