A gas can be taken from A to B via two different processes A C B and A D B. When path A C B is used 60 J of heat flows into the system and 30J of work is done by the system. If path ADB is used work done by the system is 10 J . The heat Flow into the system in path ADB is :
A. 40 J
U remains same for both paths ACB and ADB Q_ A C B = W_ A C B + U_ A C B 60 ~J =30 ~J + U _ ACB U _ ACB =30 ~J As change in internal energy depends only on initial and final point U _ ADB = U _ ACB =30 ~J Q _ ADB = U _ ADB + W _ ADB =10 ~J +30 ~J =40 ~J
Related: Physics — Thermodynamics · All PYQ Banks