If a system has 2.00 × 10 2 kcal 2.00×102 kcal of work done to it, and releases 5.00 × 10 2 kj 5.00×102 kj of heat into its surroundings, what is the change in internal energy of the system?

336.8 kilo Joules is the change in internal energy of the system.

Explanation:

The equation for first law of thermodynamics follows:

where,

Q = heat added to the system

ΔU = Change in internal energy

W = work done

We have :

Amount of heat given out by the system will be negatuive as heat relased by the system = Q

Q=

Work done on the system will positive as work is done on the system:

w =

336.8 kilo Joules is the change in internal energy of the system.