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Questions and Answers
What does the first law of thermodynamics provide information about?
According to the first law, what would happen to the energy gained by one end of a metallic bar if it spontaneously became warmer?
What does the second law of thermodynamics provide?
What is not addressed by the first law of thermodynamics?
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What would happen to the temperature of a metallic bar if it spontaneously became warmer at one end and cooler at the other?
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Study Notes
Laws of Thermodynamics
- The First Law of Thermodynamics states that energy balance is maintained during a change of state or thermodynamic process, but does not indicate feasibility of the process.
- The First Law only states that if a process occurs, energy gained by one part of the system is exactly equal to the energy lost by another part, but does not indicate probability of the process.
- The Second Law of Thermodynamics provides the criterion for the probability of various processes.
- The Second Law can determine whether a process is feasible or not, such as whether a metallic bar of uniform temperature can spontaneously become warmer at one end and cooler at the other.
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Description
Understand the limitations of the first law of thermodynamics in predicting energy balance and feasibility of thermodynamic processes. Learn how it applies to changes of state and energy transfer.
