Question -
Answer -
According to the first lawof thermodynamics,
ΔU = q + W (i)
Where,
ΔU = change in internal energyfor a process
q = heat
W = work
Given,
q = + 701 J (Since heat is absorbed)
W = –394 J (Since work is done by thesystem)
Substituting the values inexpression (i), we get
ΔU = 701 J + (–394 J)
ΔU = 307 J
Hence,the change in internal energy for the given process is 307 J.