Thermodynamics Question 112
Question: If R = universal gas constant, the amount of heat needed to raise the temperature of 2 mole of an ideal monoatomic gas from 273K to 373K when no work is done
[MP PET 1990]
Options:
A) 100 R
B) 150 R
C) 300 R
D) 500 R
Show Answer
Answer:
Correct Answer: C
Solution:
$ \Delta Q=\Delta U+\Delta W $
$ \because $ $ \Delta W=0 $
Therefore $ \Delta Q=\Delta U $
$ =\frac{f}{2}\mu R\Delta T $
$ =\frac{3}{2}\times 2R(373-273) $ = 300R.
