6.7 In a process, 701 J of heat is absorbed by a system and 394 J of work is done by the system. What is the change in internal energy for the process?
The first law of Thermodynamics state that,
where, = change in internal energy for the process
q = heat and W = work
Given that,
q = +701 J (heat is absorbed)
W = - 394 (work is done by the system)
Substituting the value in equation of first law we get,
So, the change in internal energy for the process is 307 J