Correct Answer - Option 3 : 100 J
Concept:
The first law of thermodynamics
This law states that the total heat given or taken out of the system will always be equal to the work done and change in the internal energy of the system.
⇒ Q = W + ΔU
Where Q = heat, W = work done, and ΔU = change in internal energy
Calculation:
Given Q = 200 J, and ΔU = 100 J
By the first law of thermodynamics,
⇒ Q = W + ΔU
⇒ W = Q - ΔU
⇒ W = 200 - 100
⇒ W = 100 J
Hence, option 3 is correct.
