Question

The P - V diagram of a system undergoing a thermodynamic process is shown in figure. Work done by the system in going from $A\to B\to C$ is 30 J and 40 J heat is given to the system. The change in internal energy of the gas if the gas is directly taken from A to C is

• A. 10 J
• B. 70 J
• C. 84 J
• D. 134 J

Answer 1

The correct option is A 10 J

For process $A\to B\to C$

$\Delta u=\Delta \theta -\Delta \omega$

$=40-30$

$=10J$

$A\to C$

$\Delta u=10J$

Hence$,$ option $\left(A\right)$ is correct$.$