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For the isothermal expansion of an ideal gas
In isothermal reversible process ideal gas has constant temperature and so ΔE = 0 and ΔH = ΔE = 0.
If a refrigerator's door is opened, then we get [CPMT 1980]
The compressor has to run for longer time releasing more heat to the surroundings.
Point out the wrong statement in relation to enthalpy
Enthalpy is an extensive property.
Mark the correct statement
Total energy of an isolated system is constant.
Internal energy is an example of [Pb. PMT 2000]
The functions whose value depends only on the state of a system are known as state functions.
The intensive property among these quantities is [KCET 2002]
The intensive property is mass/volume.
Which of the following is not a state function [DCE 2002]
ΔQ is not a state function.
Which of the following is true for an adiabatic process [DCE 2002; MP PET 1995, 98, 2004; CPMT 1990; MP PMT 1998, 2002]
For adiabatic process ΔQ = 0.
Which of the following is not a state function
Work is not a state function as during a process its value depends on the path followed. The value of enthalpy, internal energy and entropy depends on the state and not on the path followed to get that state, hence these are state functions.
Among them intensive property is [AFMC 2004]
Surface tension is an intensive property which do not depend upon the quantity of matter present in the system.
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