Sustainable Energy
Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
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Chapter 11, Problem 1P
To determine

Find the final temperature of water.

Expert Solution & Answer
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Answer to Problem 1P

The final temperature of water is 20.23°C¯.

Explanation of Solution

Given information:

The mass of one cubic meter water m is 1,000kg.

The vertical height h is 100m.

The initial temperature T0 is 20°C

Calculation:

Take the gravitational constant g as 9.8m/s2.

Find the potential energy at the height h E as follows:

E=mgh=1,000kg×9.8m/s2×100m=98×104J

Take the specific heat of water C as 4,186J/kg°C.

Calculate the change in temperature ΔT as follows:

ΔT=EmC=98×104J1,000kg×4,186J/kg°C=0.23°C

Find the final temperature of water T as follows:

T=T0+ΔT=20°C+0.23°C=20.23°C

Therefore, the final temperature of water is 20.23°C¯.

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