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NEET UG CHEMISTRY MCQ: THERMODYNAMICS
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Heat of formation of compound is defined as :
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Correct option: A
Heat evolved to form one mole of the compound from its elements
Option A is correct because the heat of formation is defined as the enthalpy change when one mole of a compound is formed from its constituent elements in their standard states.
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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