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Physics, 02.12.2019 23:10 lekab0001

Which of the following must be true about an ideal gas that undergoes an isothermal expansion? (there may be more than one correct choice.)

(a) no heat enters the gas.
(b) the pressure of the gas decreases.
(c) the internal energy of the gas does not change.
(d) the gas does positive work.

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