University Physics III · Thermodynamics · 7.01
Thermodynamic systems and the first law
System, surroundings, and boundary; internal energy as a state function; heat and work as boundary transfers rather than stored quantities; a declared sign convention; and what the first law actually requires - a closed system and equilibrium end states, with no restriction that the path between them be quasi-static.
Course-map guide · not a complete lesson or simulationScope & orientation
What this subsection covers
System, surroundings, and boundary; internal energy as a state function; heat and work as boundary transfers rather than stored quantities; a declared sign convention; and what the first law actually requires - a closed system and equilibrium end states, with no restriction that the path between th…A strong response uses p-v process and cycle diagrams and states where the model stops being reliable.
Reasoning checklist
Evidence, assumptions and limits
Assumptions to state
State the system, observable, approximation, and conditions held fixed before using a model.
Evidence to collect
What heat-capacity ratio do pressure and volume data from a rapid compression support, and how slow must the compression be before the adiabatic model fails?
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What heat-capacity ratio do pressure and volume data from a rapid compression support, and how slow must the compression be before the adiabatic model fails? Useful evidence includes synchronised pressure and volume traces, a log-log fit whose slope gives the exponent, residuals, propagated uncertainty, a slow-compression comparison, and a stated range of compression rates.
Limits to state
This GioPhysics course map is an adaptable learning sequence, not academic credit, accreditation, or a universal university syllabus.
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This GioPhysics course map is an adaptable learning sequence, not academic credit, accreditation, or a universal university syllabus. Third-semester content is the least standardised of the introductory sequence: departments place oscillations, waves, optics, and thermal physics differently, and the modern-physics units here are a bounded survey rather than a complete course in relativity, quantum mechanics, atomic, nuclear, or particle physics. Follow your institution's published scope, notation, laboratory programme, and assessment rules. A result should be checked against units, signs, limiting cases, and the conditions under which its model was derived.
Diagram & examples
Work the claim before choosing an equation
Interactive concept map
Follow the model from claim to evidence.
Model, evidence, and boundary
Which response about Thermodynamic systems and the first law is most defensible?
modelModel, evidence, and boundary turns the stated idea into a representation that can make a prediction.
Example questions
Try the reasoning before revealing the structure.
Which response about Thermodynamic systems and the first law is most defensible?
Quick check
Test the reasoning, not recall
Which response about Thermodynamic systems and the first law is most defensible?
Choose an answer to test the model.