Thermodynamics and Thermochemistry - Result Question 51
Assertion and Reason
Read the following questions and answer as per the direction given below :
(a) Statement I is true; Statement II is true; Statement II is the correct explanation of Statement I
(b) Statement I is true; Statement II is true; Statement II is not the correct explanation of Statement I
(c) Statement I is true; Statement II is false
(d) Statement I is false; Statement II is true
51.
Statement I The heat absorbed during the isothermal expansion of an ideal gas against vacuum is zero.
Statement II The volume occupied by the molecules of an ideal gas is zero.
(2000, S, 1 M)
Show Answer
Answer:
Correct Answer: 51. (b)
Solution:
Statement I is true.
$ d q =d E+p _{\text {ext }} d V=0 $
$\Delta T =0 $
$\therefore d E =0 ; \quad p _{\text {ext }}=0 $
$\therefore \quad p _{\text {ext }} d V =0$
Statement II is true. According to kinetic theory of gases, volume occupied by molecules of ideal gas is zero.
However, Statement II is not the correct explanation of Statement I.
BETA
