Can the Sun Heat a Liquid to Five Times Its Own Temperature?

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SUMMARY

Heating a liquid to a temperature five times that of the Sun is impossible due to the laws of thermodynamics. The discussion emphasizes that while focusing solar energy can increase the temperature of a liquid, it cannot exceed the source temperature. The concept of thermal equilibrium is crucial, as achieving a temperature higher than the heat source would require a decrease in entropy, which contradicts the second law of thermodynamics.

PREREQUISITES
  • Understanding of thermal equilibrium concepts
  • Familiarity with the laws of thermodynamics
  • Knowledge of entropy and its relationship to temperature
  • Basic principles of solar energy concentration techniques
NEXT STEPS
  • Study the second law of thermodynamics and its implications on heat transfer
  • Research solar concentrators and their effectiveness in heating liquids
  • Explore entropy calculations and their relevance in thermal processes
  • Investigate real-world applications of solar energy in heating systems
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Students in physics, engineers working with thermal systems, and anyone interested in the principles of energy transfer and thermodynamics.

steve233
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Homework Statement



Is it possible to use the heat of the sun to heat a liquid (arbitrary liquid) to a temperature that is hotter than the sun, say 5 times hotter?

Homework Equations


Concepts in thermal equilibrium

The Attempt at a Solution


My answer is no since you can't get more heat from what is not there. On the other hand, if you can focus the energy from the sun then this is where I am unsure.

Thanks
 
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No, this is not possible, because heating something to be hotter than the source, requires a decrease in entropy (don't have the equation relating to this with me, one that relates S to T), which according to T-D is virtually impossible.
 

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