Question

25. What is the difference between STP and standard conditions?

Answer 1

STP is short for Standard Temperature and Pressure, which is defined to be 273 K (0° Celsius) and 1 atm pressure. STP describes Standard Conditions. STP is often used for measuring gas density and volume using the Ideal Gas Law. Here, 1 mole of ideal gas occupies 22.4 L.

Standard State conditions are used for thermodynamics calculations. Several conditions are specified for standard state:

The standard state temperature is 25°C (298 K). Note that temperature is not specified for standard state conditions, but most tables are compiled for this temperature.
All gases are at 1 atm pressure.
All liquids and gases are pure.
All solutions are at 1M concentration.
The energy of formation of an element in its normal state is defined as zero.
Standard state calculations may be performed at another temperature, most commonly 273 K (0° Celsius), so standard state calculations may be performed at STP. However, unless specified, assume standard state refers to the higher temperature.

Answer 2

thank you!!! =D =)

Answer 3

You're welcome!!