For an isothermal process of an ideal gas, what is the form of the First Law of Thermodynamics?
Formula: Q = - W Applicable conditions: Isothermal process of an ideal gas (constant temperature T ). Explanation: The internal energy of an ideal gas depends…
Syllabus path: Thermal Physics › First Law of Thermodynamics
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CSCA Physics Formula Reference
Formula and explanation
Formula: Q = - W Applicable conditions: Isothermal process of an ideal gas (constant temperature T ). Explanation: The internal energy of an ideal gas depends only on temperature. Constant temperature means constant internal energy ( Δ U = 0 ). Therefore, the heat added to the system ( Q ) is entirely used to do work on the surroundings ( - W, since W is work done on the system).
Related tutorial and examples
First Law of Thermodynamics
First Law of Thermodynamics 1. Core Concepts & Sign Convention The First Law of Thermodynamics is essentially the Law of Conservation of Energy applied to thermal processes. For a system (like gas in a cylinder), the change in internal energy Δ U equals the sum of heat Q supplied…
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