Find the external work done by the system inkcal, when 20 kcal of heat is supplied to the system the increase in the internal energy is 8400 J. (1=4200J/kcal)

Find the external work done by the system inkcal, when 20 kcal of heat

1.	Find the external work done by the system inkcal, when 20 kcal of heat is supplied to the system the increase in the internal energy is 8400 J. (1=4200J/kcal)
Answer» 16 KCAL 18 kcal 20 kcal 19 kcal Answer :B