Thermodynamics Question 109
Question: If the amount of heat given to a system be 35 joules and the amount of work done by the system be $ -15 $ joules, then the change in the internal energy of the system is
[MP PMT 1989]
Options:
A) $ -50 $ joules
B) 20 joules
C) 30 joules
D) 50 joules
Show Answer
Answer:
Correct Answer: D
Solution:
$ \Delta Q=\Delta W+\Delta U\Rightarrow 35=-15+\Delta U\Rightarrow \Delta U=50J $
