Thermodynamics Question 138
Question: When heat energy of 1500 Joules, is supplied to a gas at constant pressure $ 2.1\times 10^{5}N/m^{2} $ , there was an increase in its volume equal to $ 2.5\times {{10}^{-3}}m^{3} $ . The increase in internal energy of the gas in Joules is
[EAMCET (Engg.) 1999]
Options:
A) 450
B) 525
C) 975
D) 2025
Show Answer
Answer:
Correct Answer: C
Solution:
According to FLOT $ \Delta Q=\Delta U+P(\Delta V) $
Therefore $ \Delta U=\Delta Q-P(\Delta V) $
$ =1500-(2.1\times 10^{5})(2.5\times {{10}^{-3}}) $ =975 Joule
