STP Calculator

This Standard Temperature and Pressure Calculator is an easy tool for calculating the volume and number of moles of gas under standard conditions. It simply takes the gas's volume, pressure, and temperature as inputs and outputs the number of moles and volume of gas in a short amount of time.

STP Calculator: Our free online calculator makes it simple to calculate STP standard gas temperature and pressure. Continue reading to learn about STP temperature and pressure conditions, conventional formulas, and how to compute volume and moles. In the next sections, you can find examples of questions and their answers.

What is Standard Temperature and Pressure?

The ambient parameters for a chemical reaction are described by standard temperature and pressure, sometimes known as STP or standard conditions. The following are the ideal gas's standard conditions

  • The standard temperature is 273.15 Kelvin, which equals 0°C or 32°F. It is the temperature at which water freezes.
  • 1 atm = 760 torr = 760 mm Hg = 101.35 kPa is the standard pressure. It has only one atmosphere.
  • In typical conditions, 1 mol of an ideal gas has a volume of 22.4 litres.

STP Formulas

Here are the formulas for calculating volume and moles at STP conditions VSTP = V * (273.15/T) * (P/760) No. of Moles at STP = VSTP/22.4

  • Where, V = volume of the gas
  • T = temperature of the gas
  • P = pressure of the gas

The following are some other formulas that can be employed in this situation Gay-Lussac's law: P₁T₂ = P₂T₁ Charles's law: V₁T₂ = V₂T₁ Boyle's law: P₁V₁ = P₂V₂

How to calculate the volume and number of moles in standard conditions?

In the following sections, you'll find a detailed step-by-step procedure for calculating the number of moles and the volume of the gas under typical conditions.

  • Step 1: Calculate the standard temperature and pressure, as well as the gas volume.
  • Step 2: Divide the temperature by 273.15 and the pressure by 760.
  • Step 3: To get the volume at STP, multiply those numbers by the volume.
  • Step 4: To determine the number of moles, divide the volume at STP by 22.4.

How to use our standard temperature and pressure calculator?

Four simple steps are required to use our standard temperature and pressure calculator

  • Step 1: Enter the gas's volume.
  • Step 2: Enter the temperature at which the process is occurring.
  • Step 3: Enter the gas pressure here.
  • Step 4: Your results are now available! At standard conditions, you will receive both the volume and the number of moles of your substance.

STP Examples

Question 1: If the gas temperature is 150 K, volume is 15 litres and pressure is 120 Pa. How can I calculate the volume and number of moles at STP?



Temperatute T = 150 Kelvin

Volume V = 15 litres = 0.015 m3

Pressure P = 120 Pa

VSTP = V * (273.15/T) * (P/760)

= 0.015 * (273.15/150) * (120/760)

= 4.312 x 10^-3 mm

Number of moles at STP = VSTP/22.4

= 4.312 x 10^-3/22.4

= 0.192

Hence, the number of moles = 0.192, volume of the gas at Standard Temperature 4.312 x 10^-3 mm respectively.

FAQ’s on STP Calculator

1. What does STP Stand For?

Standard temperature and pressure are represented as "STP." We know that the standard temperature is 273 k or 0° Celsius and that the standard pressure is 1 atmosphere.

2. What are the benefits of using STP Conditions?

When comparing multiple sets of data, STP conditions prove to be very helpful. We may clearly understand the distinctions between them if we explain each response as though it occurs under ordinary conditions.

3. What is the procedure for using a standard temperature and pressure calculator?

To determine the volume and number of moles in the gas at standard conditions, enter the volume, temperature, and pressure of the gas and press the calculate button.

4. At STP, how do you calculate the volume of a dry gas?

STP (standard temperature and pressure) represents IUPAC's standard conditions of T = 273.15 K and P = 1 atm. With these temperature and pressure numbers at STP, we can readily determine the volume occupied by 1 mol of gas, which is 22.4 L.V = 22.4256 L.