The work done by a system is 45 kJ. If the internal energy of the system is decreased by 15 kJ. What is the heat received (in kJ) by the system?

The work done by a system is 45 kJ. If the internal energy of the syst

1.	The work done by a system is 45 kJ. If the internal energy of the system is decreased by 15 kJ. What is the heat received (in kJ) by the system?
A.	-60
B.	-30
C.	30
D.	60
Answer» D. 60