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Heisse Milch

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Level 5 -
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Exercise

https://texercises.raemilab.ch/exercise/heisse-milch/

Question

Solution

Short

Video

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Need help? Yes, please!

The following quantities appear in the problem: Masse

m

/ Temperatur

T

/ Wärme

Q

/ spezifische latente Wärme

L

/ Wärmekapazität

c

The following formulas must be used to solve the exercise:

Q = c \cdot m \cdot \Delta\vartheta \quad

Q = m \cdot L_{\scriptscriptstyle\rm f} \quad

\sum Q^\nearrow \stackrel{!}{=} \sum Q^\swarrow \quad

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Exercise:
Leider ist die Milch m_M gram zu heiss T K und Sie geben einen Eiswürfel von m_E gram theta_E cel dazu. Was passiert? Rechnen und beschreiben Sie. Nehmen Sie für die Werte von Milch diejenigen von Wasser.

Solution:
Die Wärmemenge welche für das Schmelzen gebraucht wird ist Q_S m L_f approx .kiloJ Damit kann die Milch um Delta T fracQ_Sc m_W approx .K abgekühlt werden. Somit ist die Milch nun bei theta'_m apx .cel und das Eis ist geschmolzen. Damit mischen diese beiden Flüssigkeiten und es gilt: theta_m fractheta'_m m_Mm_M+m_E apx cel. Damit liegt am Schluss ein Milch-Wassergemisch bei cel vor.

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Tags	hauptsätze der thermodynamik, thermodynamik
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Difficulty	(3, default)
Points	0 (default)
Language	(Deutsch)
Type	Calculative / Quantity
Creator	cm
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