# How does entropy change with pressure?

where

THE MAXWELL-ENTHALPY RELATION

Applying differential form, we obtain:

The relationship between entropy and reversible heat flow is also related to heat flow:

This is what the Maxwell relation would give you.

ENTROPY VS. ENTHALPY

Ultimately, after integrating this, we obtain:

ENTROPY VS. PRESSURE

As a result, an ideal gas's entropy changes negatively as pressure rises; however, the system's actual entropy change could be positive or negative, contingent upon temperature changes.

However, a liquid's change in pressure has a smaller negative impact on entropy change because a liquid's volume changes relatively little with small pressure increases that should significantly compress a gas.

For small pressure values that would otherwise be significant for gases, I would not expect pressure to significantly change any entropy patterns that solids already have.

Depending on how many "ways" a di/polyatomic solid can exist, we can think about either the bond strength or the complexity. One of the most widely used thermodynamics equations is:

where

Because there are fewer microstates available to the solid, the stronger the bond, the smaller the entropy.

Here are some data that show that.

Growing charge intensities:

Naturally, an increase in bond order or bond strength corresponds with an increase in charge magnitudes.

Growing the difference in radii:

An increased internuclear distance and, consequently, a weaker bond are typically correlated with larger differences in cation/anion radii.

Furthermore, it doesn't hurt to look up alkaline earth metal carbonates going down the periodic table on Wikipedia, since I seem to remember carbonates decomposing at higher temperatures (which I thought was strange when I first learned about it).

Furthermore, the entropy is much higher for more complex substances like buckminsterfullerene because they can assume more microstates for a given macrostate (more possible molecular motions, more vibrational modes, etc.).

By signing up, you agree to our Terms of Service and Privacy Policy

Entropy generally increases with pressure for gases and decreases with pressure for liquids and solids. This relationship is described by the second law of thermodynamics, which states that the entropy of a closed system tends to increase over time.

By signing up, you agree to our Terms of Service and Privacy Policy

- If 150 grams of water is heated from 200°C to 0°C, how many joules of heat energy are absorbed?
- What is likely to be cooler on a sunny day: ocean water or sand on the beach?
- It takes 23.5 kJ of heat energy to raise the temperature of 100 g of a substance by 50°C. What is the substance?
- Why is an exothermic reaction spontaneous?
- A sample of substance X that has a mass of 326.0 g releases 4325.8 cal when it freezes at its freezing point. If substance X has a molar mass of 58.45 g/mol, what is the molar heat of fusion for substance X?

- 98% accuracy study help
- Covers math, physics, chemistry, biology, and more
- Step-by-step, in-depth guides
- Readily available 24/7