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Physics Principles with Applications
Found in: Page 412
Physics Principles with Applications

Physics Principles with Applications

Book edition 7th
Author(s) Douglas C. Giancoli
Pages 978 pages
ISBN 978-0321625922

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Short Answer

In an isothermal process, 3700 J of work is done by an ideal gas. Is this enough information to tell how much heat has been added to the system? If so, how much? If not, why not?

The heat added to the system is 3700 J.

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Step by Step Solution


By the first law of thermodynamics, \(\Delta U = Q - W\).

For the isothermal process, change in internal energy, \({\bf{\Delta }}U = {\rm{0}}\).


For the isothermal process,

\(\begin{aligned}{c}0 = Q - W\\Q = W.\end{aligned}\)

In the isothermal process, the work done equals the heat supplied to the system.

Hence, the heat added to the system is 3700 J.

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