ΔS gás ideal (expansão)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
expansão isoterm
About this calculator
The ideal gas entropy calculator is a useful tool for calculating the change in entropy in chemical reactions, especially in isothermal expansions. It uses the formula ΔS = nR·ln(V₂/V₁), where n is the number of moles, R is the gas constant, V₁ is the initial volume and V₂ is the final volume.
This calculator is ideal for chemistry students and professionals who need to calculate entropy in different scenarios. It is easy to use and provides accurate results in just a few seconds.
Remember that entropy is a quantity that measures the disorder or randomness of a system. In isothermal expansions, entropy increases due to the dispersion of molecules in a larger volume.
Before using this calculator, make sure you understand the formula and the underlying concepts of ideal gas entropy.
Frequently asked questions
What is entropy?
Entropy is a quantity that measures the disorder or randomness of a system. In practical terms, it represents the amount of energy unavailable to perform useful work.
When to use this calculator?
This calculator is ideal for calculating entropy in isothermal expansions of ideal gases. It is useful in various scenarios, such as chemical reactions and industrial processes.
What is expansion factor?
The expansion factor is the ratio between the final volume and the initial volume of a system. It is essential to calculate entropy in isothermal expansions.
Can you help me with an example?
Yes, certainly! If you have an initial volume of 1 mole of gas and a final volume of 2 moles, and you want to calculate the entropy, just insert the values and use this calculator.
What is gas constant?
The gas constant (R) is a physical constant that relates the pressure, volume, and temperature of a gas. It is essential to calculate entropy in different scenarios.