Answer: The final energy is 1,700 J
Explanation: According to first law of thermodynamics:
[tex]\Delta U=q+w[/tex]
[tex]\Delta U=U_2-U_1[/tex]=Final energy-initial energy=Change in internal energy
q = heat absorbed or released
w = work done by or on the system
w = work done by the system=[tex]-P\Delta V[/tex] {Work done by the system is negative as the final volume is greater than initial volume}
q = +500J {Heat absorbed by the system is positive}
w = work done by the system = -300J
[tex]U_2-1500J=+500J-300J[/tex]
[tex]U_2=1700J[/tex]
