Your hydrometer reading is 173.0 at 70 degrees F. What is the true proof of the brandy?

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Elin HesselLv2

13 May 2020

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Hydrometer Problem: 2Parts

A) Suppose you made your own hydrometer. If its massis11.5 g, what volume will the hydrometer displace in a liquid withadensity of 1.20 g/cm³?

I believe I understand this question. If you dividethemass of the hydrometer, 11.5 g, by the density of the water,1.20g/cm³, you find the volume of the hydrometer to be9.58cm³. Since a solid sinks in a liquid until the massofthe liquid it displaces is equal to its own mass, it woulddisplacethe same volume as itself. So, it would displace9.58cm^3.Correct?

B) Suppose the lower part of your hydrometer has avolumeof 7.0 cm³, and the upper part is 5.0cm long andhas across-sectional area of 0.62 cm². What length oftheupper part of the hydrometer will be submerged?

No idea...

A 100g ice cube at -10 degrees C is placed in an aluminum cup whoseinitial temperature is 70 degrees C. The system comes to anequilibrium temperature of 20 degrees C.

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a)Determine the change in entropy for the cooling process.
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Your hydrometer reading is 173.0 at 70 degrees F. What is the true proof of the brandy?

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