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NEET UG CHEMISTRY MCQ: THERMODYNAMICS
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Which of the following is correct for a reaction to be spontaneous?
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Correct option: B
The correct answer is B () because a reaction is spontaneous when it results in a decrease in enthalpy (negative ∆H) and an increase in entropy (positive ∆S).
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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