Which of the following best describes standard temperature and pressure (STP) as commonly used in general chemistry?

• A. 298 K and 1 bar
• B. 273 K and 1 atm
• C. 273 K and 1 bar
• D. 298 K and 1 atm

Answer: (B)

Verified step by step guidance

1. Understand that STP (Standard Temperature and Pressure) is a set of conditions commonly used in chemistry to provide a reference point for experiments and calculations involving gases.
2. Recall the standard temperature value for STP, which is the freezing point of water, given as 273 K (0 degrees Celsius).
3. Recall the standard pressure value for STP, which is 1 atmosphere (atm), a unit of pressure commonly used in chemistry.
4. Compare the given options to these standard values: temperature = 273 K and pressure = 1 atm.
5. Conclude that the option '273 K and 1 atm' best describes STP as commonly used in general chemistry.