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NEET UG CHEMISTRY MCQ: THERMODYNAMICS
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The enthalpy of formation steadily changes from to as we go from to The value of however shows opposite trend from for to for Why?
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Correct option: C
In the formation of from carbon atoms and hydrogen molecules there is a large decrease in entropy. This is reflected in the values
Option C is correct because the large decrease in entropy during the formation of larger alkanes from carbon atoms and hydrogen molecules significantly affects the values, reversing the trend observed in .
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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