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Proper Units of Heat

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What amount of heat is required to change 10 grams of Ice at -10 degrees Celsius into steam at 120 degrees Celsius?

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This problem will have different parts: (1) Find the heat needed to bring the ice from -10 to 0 Celsius (Q1) (2) then find the heat needed to melt the ice (Q2) (3) then find the heat to bring the water ...

Solution Summary

The proper units of heat are examined. The specific heat and latent heat values are given.

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Identify the bottleneck

Deb Samson is the owner of a company that produces glass products, suh as shower doors, table tops, and specialty windows for recreational vehicles. The process involves cutting glass into the proper shape, smoothing the edges, heat treating, and packaging. The cutting process is automated and very rapid; two minutes are required to ut a piece of glass to the proper dimensions. The smoothing, heat treating, and packaging processes require eight minutes, ten minutes, and three minutes, respectively. A simple diagram of the process is shown below.

Cutting- 2 minutes
Smoothing- 8 minutes
Heat treating- 10 minutes
Packaging- 3 minutes

a. Identify the bottleneck or process constraint
c. Calculate the throughput for an eight-hour shift

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