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Questions and Answers
What does the first law of thermodynamics provide information about?
What does the first law of thermodynamics provide information about?
- The direction of spontaneous heat transfer
- The energy balance during a change of state or process (correct)
- The probability of various thermodynamic processes
- The difference between heat and temperature
According to the first law, what would happen to the energy gained by one end of a metallic bar if it spontaneously became warmer?
According to the first law, what would happen to the energy gained by one end of a metallic bar if it spontaneously became warmer?
- It would be lost by the other end (correct)
- It would be transferred to the surroundings
- It would be stored in the bar
- It would be converted to another form of energy
What does the second law of thermodynamics provide?
What does the second law of thermodynamics provide?
- A description of the direction of spontaneous heat transfer
- A measure of the energy balance in a system
- A criterion for the probability of various processes (correct)
- A definition of temperature and heat
What is not addressed by the first law of thermodynamics?
What is not addressed by the first law of thermodynamics?
What would happen to the temperature of a metallic bar if it spontaneously became warmer at one end and cooler at the other?
What would happen to the temperature of a metallic bar if it spontaneously became warmer at one end and cooler at the other?
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.
