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Thermodynamics: You have a (mostly) insulated carafe in which you store your coffee. Coffee can be...

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Mechanical Engineering

Thermodynamics: You have a (mostly) insulated carafe in whichyou store your coffee. Coffee can be modeled as saturated water forthis problem. The internal volume of your carafe is 1 L and youseal the lid when it contains 900 g of coffee (mostly liquid, somevapor) at 90 â—¦C.

1. What is the mass [g] of water vapor in the carafe?

You are very busy at work and forget to drink your coffee. Bythe end of the day, it has cooled to 35 â—¦C.

2. How much energy [kJ] was lost through the walls of thecarafe?

3. What is the pressure [kPa] of your now barely warmcoffee?

Answer & Explanation Solved by verified expert
4.5 Ratings (724 Votes)
Solution Given V 1L 0001 m3 T 90273 363 K As standard we know that P 925 mm Hg for standard liquid 1mm Hg 13332 pa so that    See Answer
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