Question

What is the change in internal energy of the system (ΔU) if 50 kJ of heat energy is released What is the change in internal energy of the system   (ΔU)  if   50 kJ   of heat energy is released

by the system and 40 kJ of work is done by the system for a certain process?by the system and   40 kJ   of work is done by the system for a certain process?

Select one:

a.
−90 kJ−90 kJ

b.
+90 kJ+90 kJ

c.
10 kJ10 kJ

d.
+10 kJ