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Chapter 3: Q1DQ (page 609)

Section 18.1 states that ordinarily, pressure, volume, and temperature cannot change individually without one affecting the others. Yet when a liquid evaporates, its volume changes, even though its pressure and temperature are constant. Is this inconsistent? Why or why not?

Short Answer

Expert verified

Answer

The fact that the equation of state is applied only to a particular state of matter and is not applicable in the case of phase transition, makes it clear that the given condition is consistent with the equation of state

Step by step solution

01

About Ideal Gas Equation

If the particles of a gas have no intermolecular forces and the collisions between these particles are perfectly elastic, the gas is called an Ideal Gas.

02

Determine Temperature, Volume and pressure affect each other

Accordingto the equation of state expressed as-

PV=nRT

Here, P is pressure, V is volume, T is Temperature, n is the number of moles and R is the Gas Constant.

An equation of state of this form applies only to a single phase of the material, either solid,liquid, or gases.Different behaviour is observed when applied for phase change.

Therefore, the given condition is not inconsistent with the equation.

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