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Because a hot water supply must also heat some pipe mass
Chapter 3, Problem 122HP(choose chapter or problem)
Problem 122HP
Because a hot water supply must also heat some pipe mass as it is turned on, the water does not come out hot right away. Assume 70°C liquid water at 100 kPa is cooled to 45°C as it heats 15 kg of copper pipe from 20 to 45°C. How much mass (kg) of water is needed?
Questions & Answers
QUESTION:
Problem 122HP
Because a hot water supply must also heat some pipe mass as it is turned on, the water does not come out hot right away. Assume 70°C liquid water at 100 kPa is cooled to 45°C as it heats 15 kg of copper pipe from 20 to 45°C. How much mass (kg) of water is needed?
ANSWER:
Solution
Step 1 of 3
We need to find out how much mass of water is needed, if water at is cooled to as it heats of copper pipe from to .