How much work is done by the system if the internal energy decrease by 100j when 200j applied to the system

To determine the amount of work done by the system, we can use the First Law of Thermodynamics, which states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system.

In this case, we know that the internal energy of the system decreased by 100 J. We also know that 200 J of heat was applied to the system. We need to find the work done by the system.

Let's calculate the work done by the system using the formula:

Change in internal energy (ΔU) = Heat added to the system (Q) - Work done by the system (W)

Given:
ΔU = -100 J (negative sign indicates a decrease in internal energy)
Q = 200 J

Using the formula, we can rearrange it to solve for the work done by the system (W):

W = Q - ΔU

Substituting the given values:

W = 200 J - (-100 J)
W = 200 J + 100 J
W = 300 J

Therefore, the work done by the system is 300 J.