Question

If 100 calorie of heat are added to system and a
work of 50 calorie is done on the system,
calculate the energy change of the system.
(1)-150 Joul (2) +150 cal.
(3) +50 cal
(4)-50 Joule​

Answer 1

Answer:Heat absorbed, q=100cal

Work done on the system, w=+50cal

Applying the first law of thermodynamics

ΔU=q+w=(100+50)=150 calorie

Explanation: