Chemical Thermodynamics Question 456
Question: At $ 27^{o}C, $ one mole of an ideal gas is compressed isothermally and reversibly from a pressure of 2 atm to 10 atm. The values of $ \Delta E $ and q are $ (R=2) $
Options:
A) 0, - 965.84 cal
B) - 965.84 cal, + 965.84 cal
C) + 865.58 cal, - 865.58 cal
D) - 865.58 cal, - 865.58 cal
Show Answer
Answer:
Correct Answer: A
Solution:
- $ W=2.303,nRT,\log \frac{P_2}{P_1} $
$ =2.303\times 1\times 2\times 300,\log \frac{10}{2}=965.84 $
at constant temperature, $ \Delta E=0. $
$ \Delta E=q+w $ ; $ q=-w=-965.84,cal $ .
