Chemical Thermodynamics Question 101
Question: During an isothermal expansion of an ideal gas its [CBSE PMT 1991]
Options:
A) Internal energy increases
B) Enthalpy decreases
C) Enthalpy remains unaffected
D) Enthalpy reduces to zero
Show Answer
Answer:
Correct Answer: C
Solution:
During isothermal expansion of ideal gas, $ \Delta T=0 $
$ \Delta H=\Delta E+P\Delta V $
$ =\Delta E+nR\Delta T $
$ =0+0=0 $ .
