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NEET UG CHEMISTRY MCQ: THERMODYNAMICS
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The gas in a refrigerator causes cooling on expansion because:
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Correct option: B
Heat of the gas is lost as work is done by the gas
Option B (Heat of the gas is lost as work is done by the gas) is correct because during expansion, the gas performs work, which requires energy, leading to a decrease in the gas's internal energy and thus cooling.
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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