Answer:
The internal energy of the system is 42 J.
Explanation:
Given that,
Heat energy = 82 kJ
Work done = 40 kJ
We need to calculate the change in internal energy
Using first law of thermodynamics
[tex]dQ=dE+(-dW)[/tex]
[tex]dQ=dE-dW[/tex]
Where, dQ = change in internal energy
dW= Work done
dE= Heat energy
Put the value into the formula
[tex]dQ=82-40[/tex]
[tex]dQ=42\ J[/tex]
Hence, The internal energy of the system is 42 J.
