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NEET UG CHEMISTRY MCQ: THERMODYNAMICS
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The heat of combustion of yellow phosphorous is and of red phosphorous is . The heat of transition of yellow phosphorus to red phosphorus is :
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Correct option: D
Option D () is correct because it is calculated by subtracting the heat of combustion of red phosphorus from the heat of combustion of yellow phosphorus.
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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