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NEET UG CHEMISTRY MCQ: THERMODYNAMICS
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Change in entropy is negative for:
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Correct option: D
Fe (1 mol,400 K)⟶Fe(1 mol,300 K)
Option D (Fe (1 mol,400 K)⟶Fe(1 mol,300 K)) is correct because the entropy decreases as the temperature decreases, leading to a more ordered state.
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The internal energy of one mole of a gas is:
An ideal gas is allowed to expand both reversibly and irreversibly in an isolated system. If is the initial temperature and is the final temperature, which of the following statements is correct?
For which of the process, ∆S is negative?
The work done by a weightless piston in causing an expansion ∆V (at constant temperature), when the opposing pressure, P is variable, is given by:
Assertion :- At constant pressure of the change work done is negative.
Reason :- During phase transition work done is always negative. For the reaction, at . Hence, is
Reason :- During phase transition work done is always negative. For the reaction, at . Hence, is