Chemistry - Thermodynamics - I Question with Solution | TestHub
ChemistryThermodynamics - IFirst law of ThermodynamicsMedium2 minQB
ChemistryMediumstatement
Statement 1: The heat absorbed during the isothermal expansion of an ideal gas against vacuum is zero.
Statement 2: The volume occupied by the molecules of an ideal gas is negligible.
Options:
Answer:
B
Solution:
Against vacuum Pext=0, so w=0. For an ideal gas at constant T, Δ U=0, so q=Δ U-w=0. Statement 1 is correct. Statement 2 is a true postulate of the ideal gas, but q=0 follows from the absence of intermolecular forces (U depends on T only) and w=0, not from negligible molecular volume. Both correct, II not the explanation: (b).
Stream:JEESubject:ChemistryTopic:Thermodynamics - ISubtopic:First law of Thermodynamics
⏱ 2mℹ️ Source: QB
Doubts & Discussion
Loading discussions...
