STP stands for Standard Temperature and Pressure, which are reference conditions used in chemistry to compare gas behaviors.
STP conditions are defined as:
- Temperature (T): 0°C = 273.15 K
- Pressure (P): 1 atmosphere (atm) = 101.325 kPa = 760 mmHg
Key points:
- Under STP, 1 mole of an ideal gas occupies 22.4 liters. This is called the molar volume of a gas at STP.
- STP is used as a standard reference to simplify calculations involving gases.
- It helps in comparing volumes, pressures, and temperatures of different gases under the same conditions.