CORRECT-INCORRECT STATEMENT Which of the following statement is incorrect? (1) Heat absorbed at ...

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CORRECT-INCORRECT STATEMENT
Which of the following statement is incorrect?
(1) Heat absorbed at constant volume by a system is equal to the work done by the system
(2) \( \Delta \mathrm{U}=\mathrm{q}+\mathrm{w} \) is mathematical statement of the first law of thermodynamics
(3) Heat absorbed by an ideal gas during isothermal expansion in vacuum is zero
(4) Both (2) and (3)
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