Q. A system absorbs 10 kJ of heat and does 4 kJ of work. The internal energy of the system
A) Increases by 6 kJ
B) Decreases by 6 kJ
C) Decreases by 14 kJ
D) Increases by 14 kJ
Explanation
(a)
$q = + 10\ kJ,\ W = - 4\ kJ$
$\because\ \mathrm{\Delta}E = q + W$
$= 10 - 4 = 6\ kJ$
So, energy increases by 6 kJ
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.