Q. When heat is given to a gas in an isothermal change, the result will be
A) External work done
B) Rise in temperature
C) Increase in internal energy
D) External work done and also rise in temp.
Explanation
(a) In isothermal change, temperature remains constant,
Hence $\mathrm{\Delta}U = 0$
Also from $\mathrm{\Delta}Q = \mathrm{\Delta}U + \mathrm{\Delta}W \Rightarrow \mathrm{\Delta}Q = \mathrm{\Delta}W$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.