   Chapter 12, Problem 50P

Chapter
Section
Textbook Problem

What is the change in entropy of 1.00 kg of liquid water at 100.°C as it changes to steam at 100.°C?

To determine
The change in entropy of the water.

Explanation

Section1:

To determine: The energy given to the water by heat.

Answer: The energy given to the water by heat is 2.26×106J/kg .

Explanation:

Given Info:

The mass of water is 1kg .

Temperature of the liquid water is 100°C .

Temperature of the steam 100°C

Formula to calculate the energy given to the water by heat is,

Q=mLv

• m is the mass of water
• Lv is the latent heat of vaporization of water

Substitute 1kg for m and 2.26×106J/kg for Lv to find the energy given to the water,

Q=(1.00kg)(2.26×106J/kg)=2.26×106J/kg

Thus, the energy given to the water by heat is 2

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